«  Firefox 151 release uplifts 

Uplifts by Product
3149 uplifts

  1. libfontconfig.so.1 (28.91%) Top crash 2041887
  2. OOM | small (9.40%) Known top crash
  3. EMPTY: no frame data available; EmptyMinidump (6.37%) 1644486
  4. IPCError-browser | GPUProcessKill (2.38%) 1996653
  5. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (2.36%) 1969401
  6. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (2.08%) 1472062
  7. AsyncShutdownTimeout | quit-application | newtabTrainhopAddon scheduleUpdateTrainhopAddonState shutting down (1.78%) 2016440
Uplifts and Backouts
Bug Component Summary
2017549 General Enable libz-rs-sys by default on release
2037552 General Disable remaining tests running on the android P5 devices
2038900 WebRTC: Audio/Video Perma dom/media/webrtc/tests/crashtests/2038533.html | single tracking bug
2039070 Task Configuration Emit pernosco pulse events on most state transitions
2040979 DOM: Device Interfaces Hang when reloading a page with an active WebSerial port open
  1. OOM | small (13.46%) Known top crash
  2. EMPTY: no frame data available; EmptyMinidump (7.84%) 1644486
  3. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (4.34%) 1969401
  4. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (3.59%) 1472062
  5. AsyncShutdownTimeout | quit-application | newtabTrainhopAddon scheduleUpdateTrainhopAddonState shutting down (3.51%) 2016440
  6. AsyncShutdownTimeout | IOUtils: waiting for profileBeforeChange IO to complete | JSON store: writing data for 'targeting.snapshot' (2.68%) 1877111
  7. shutdownhang | mozilla::SpinEventLoopUntil | nsThread::WaitForAllAsynchronousShutdowns | nsThreadManager::ShutdownNonMainThreads (2.25%) 1524247
Uplifts and Backouts
Bug Component Summary
2017166 Machine Learning: Frontend The Ask Sidebar button Open/Closed state is not read out loud by Screen readers
2018177 Machine Learning: Frontend [a11y] Smart window - Unable to reach the Add tabs or Ask Submit buttons using keyboard navigation after text is added to the Smart bar
2027078 JavaScript Engine Regression in Firefox 150: localeCompare(..., { numeric: true, sensitivity: 'base' }) now produces different descending order vs Firefox 149 for numeric-like values
2027928 IP Protection [a11y] Toggle state not conveyed to screen reader users
2028675 Machine Learning: Frontend [a11y] Combobox functionality not announced to screen reader users
2028677 Machine Learning: Frontend [a11y] "Memories" dialog, various barriers for screen reader users
2031577 Networking: Cache Unable to cache additional imap messages once cache2 disk cache is full
2032193 Machine Learning: Frontend Add “Use Smart Window by default” setting
2033806 Machine Learning: Frontend The Sidebar Conversation scrolls back to the top when switching tabs
2034260 Machine Learning: General Enable semantic history search feature gate when smart window is enabled
2036194 Machine Learning: Frontend [Feedback MVP] Send user feedback data via Glean
2036389 Machine Learning: Frontend sidebar smartbar @mention becomes malformed when switching tabs
2037056 IP Protection Extra large VPN Status Checkbox in Overflow Menu
2038262 IP Protection The VPN Get started button in settings does not work if you have removed the VPN button from the toolbar and restarted Firefox
2038944 Machine Learning: General SmartWindow request & response ids metrics are not matching
2039097 Machine Learning: Frontend Add window resizing support for Spotlight chromeless browser
2039203 DOM: UI Events & Focus Handling [TSF][Sogou] Quickly entering "=" will cause the browser to crash
2039315 Layout number increase/decrease controls obscure the number when using field-sizing: content;
2039375 Experimentation and Telemetry Growth events should be sent even if campaign ID is empty
2039387 Networking [macOS 26.5] Crashes [@ notify_register_check ] on macOS 26.5
2039503 Experimentation and Telemetry Update the nova_onboarding_marketing_body_5 string to include the "how we use data" link
2039504 Layout: Form Controls Inserting caret into textbox and selecting text with mouse cursor no longer work for input with ::first-line pseudo-element
2039516 Homepage Selecting the edge-to-edge from the wallpaper selection tool doesn't apply the wallpaper
2039787 Tabbed Browser: Split View Split View is closed when using the switch to tab option
2039795 Tabbed Browser: Split View Split View closes when using the “Move Tab to Split View”
2039970 Experimentation and Telemetry Upgrade to Adjust SDK to v5.7
2040429 Homepage Change the kit logo with soccer ball
2040479 General Support updated Azure A10 WebGL renderer strings on Windows 11 25H2
2040680 Machine Learning: General Memories generation - handle budget exceeded scenario
2040693 Layout: Scrolling and Overflow FF 151.0 not correctly rendering GUI webpage for DocfetcherPro, because CSSOM `insertSheet` API throws an exception when our new partial ::-webkit-scrollbar support is present-but-disabled
2040957 IP Protection Add browser.ipProtection.blockIPProtectionCallouts pref
2041208 Widget: Cocoa Remove App Group Container entitlements from Release and Beta channels
2041355 Downloads Downloads Settings for removing downloads is overriden when updating to Fx151
2041720 DOM: Core & HTML `<select>` dropdown does not open when element is created in a different realm and appended to parent document (Firefox 151.0.1)`
2042035 Layout: Scrolling and Overflow Perma [mozilla-release] browser/base/content/test/static/browser_parsable_css.js | single tracking bug
  1. OOM | small (12.90%) Known top crash
  2. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (5.13%) 1969401
  3. AsyncShutdownTimeout | quit-application | newtabTrainhopAddon scheduleUpdateTrainhopAddonState shutting down (4.47%) 2016440
  4. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (4.37%) 1472062
  5. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout (2.98%) 1866944
  6. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadManager::SpinEventLoopUntilInternal (2.17%)
  7. AsyncShutdownTimeout | IOUtils: waiting for profileBeforeChange IO to complete | JSON store: writing data for 'targeting.snapshot' (2.16%) 1877111
Uplifts and Backouts
Bug Component Summary
2027788 Distributions Ignore the distribution ini file if its global.id is mozillaonline
2032669 Browser Engine AiChoiceBanner should use PromoCard component
2032994 Machine Learning: Frontend Add thumbs up/down feedback actions behind pref
2033595 Homepage [Homepage Sports Widget] - Create middleware, lifecycle actions and SportsWidgetRepository interface
2033599 Homepage [Homepage Sports Widget] - Real World Cup API integration
2035450 Distributions Ignore the distribution ini file if its global.id is mozillaonline via pref
2036193 Machine Learning: Frontend [Feedback MVP] Add feedback modal for thumbs up/down
2037056 IP Protection Extra large VPN Status Checkbox in Overflow Menu
2037227 Homepage Define network data models for the WorldCup matches API + JSON deserialization
2037245 Homepage "Following [Team]" card UI
2037247 Homepage Create a SportsCardPager with a 3-dot overflow menu
2037378 Machine Learning: Frontend The Assistant Sidebar reopens Automatically when switching tabs after closing it from the X Close button
2037413 Homepage Add the Sports logo to the Homepage
2037466 Homepage Update the Sports Country Selector
2037816 Homepage Implement accessibility requirements for all the Sports components
2037817 Homepage Implement telemetry for all the Sports components
2037818 Homepage Update the Match Card implementation
2038467 IME Typing gets repeated when entering text 2 characters after @ in email fields
2039250 Experimentation and Telemetry [Experiment][Android] The PWA CFR message is triggered in the treatment B branch of the “Remove all CFRs” experiment
2039380 Homepage App crashes in private tab when sports widget feature is enabled and "new private tab entry" is disabled
2039769 Homepage [Homepage Sports Widget] - Enable pre-tournament sports widget pager with cached schedule fetch and Nimbus rollout
2039924 Bookmarks Remembered flows in BookmarksScreen remain stale even after rotation
2040294 Distributions Activate the ignoring of the mozillaOnline distribution
2040403 Homepage Implement error state for live matches
2040407 Homepage The first match is not displayed in an enlarged (focused) state for teams other than MEX and RSA on the Sports Widget
2040509 Machine Learning: Frontend Add Nimbus/configuration support for Smart Window default experiment
2040620 Homepage Implement third place, Champion cards and nullable teams
2040711 Homepage [Homepage Sports Widget] - Surface tournament-winner and third-place outcomes on sports widget FINAL and THIRD_PLACE_PLAYOFF cards
2040718 IP Protection Update language referencing number of locations in ipProtection.ftl
2040721 Machine Learning: Frontend Integrate round 1 feedback UI with Glean submission flow
2040825 Homepage Show generic experience for eliminated teams and pass eliminated teams to SportsWidgetState
2041156 Homepage Show full schedule one date per card for no team selected
2041235 DOM: Core & HTML invalid paste behavior with inputs in table > td
2041471 General Route win64-aarch64 generate-profile task to 25H2 builder
2041488 Homepage Update the stage parameters returned from the API
2041497 Messaging System write_in_microsurvey ping instructions are being forwarded in a clunky way
2041531 Homepage Display correct sports card header
2041537 Homepage Always enlarge the first matches (or all live matches) in a pager match card
2041541 Homepage Don't show group in related matches UI when past group stages
2041544 Homepage [Homepage Sports Widget] - Add mock server integration in debug tool
2041655 Homepage [Homepage Sports Widget] [phase2] The widget 3 dot menu has "Change team" item while no team is selected
2041688 Homepage [Homepage Sports Widget] [phase2] The Firefox logo does not change back to standard after the feature is turned OFF
2041691 Homepage [Homepage Sports Widget] [phase2] "country_selector_displayed" event not generated when the bottom sheet is opened from Firefox soccer logo
2041705 Homepage [Homepage Sports Widget] [phase2] No internet connection error is displayed if no team has been selected
2041811 Homepage Homepage sports debug tool improvement - add an apply button to session
2041887 Graphics: Text Crash in [@ libfontconfig.so.1] after users upgraded to fontconfig 2.18.0
2042018 Downloads Crash in [@ java.lang.IllegalStateException: at androidx.fragment.app.Fragment.requireContext(Fragment.java)]
2042497 Machine Learning: Frontend Remove userFeedbackCollection pref gating for Smart Window feedback UI
2043299 Homepage Suppress sports-widget error UI during one-week-to-kickoff phase when a cached schedule is available
2043514 Homepage Update Sports Pager telemetry with source and type extras
2043585 Homepage Accept nullable teams from the API
2043663 Homepage Update Champions cads implementation
2043750 Homepage Sports widget: Champion card missing when Final/Third-Place is decided in extra time
2038537 Other …
2040903 Other …
  1. OOM | small (13.87%) Known top crash
  2. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout (7.28%) 1866944
  3. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (4.82%) 1969401
  4. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (4.32%) 1472062
  5. AsyncShutdownTimeout | quit-application | newtabTrainhopAddon scheduleUpdateTrainhopAddonState shutting down (4.15%) 2016440
  6. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadManager::SpinEventLoopUntilInternal (2.38%)
  7. js::gc::detail::ChunkPtrHasStoreBuffer (2.29%) 1980548
Uplifts and Backouts
Bug Component Summary
2042115 Experimentation and Telemetry [Experiment][Android] The AI Controls settings page does not open, and a browser crash notification is received after tapping the AI Controls notification
2042532 Messaging System Expose the count of open tabs as a global targeting attribute
2043249 Graphics: WebRender Fallback to software WebRender since Firefox 151
2043307 Disability Access APIs Crash in [@ __delayLoadHelper2 | _tailMerge_uiautomationcore.dll | mozilla::a11y::uiaRawElmProvider::RaiseUiaNotificationEvent]
2044130 IP Protection Remove mentions of 50 GB bandwidth limit
2044131 IP Protection Add browser.ipProtection.bandwidth.enabled prefs to allowed prefs for feature callout CTA
2036107 Experimentation and Telemetry Update Aura Adjust settings
2039424 Experimentation and Telemetry Add new marketing partner Adjust settings
2039829 IP Protection IP-PRotection activator add-on: add VPN state and region conditions
2039866 DOM: Navigation UI hang on Windows when using back/forward buttons
2040888 IP Protection IP-Protection activator: introduce the WC tab breakage list
2041329 IP Protection IP-PRotection activator add-on: implement a date condition for the WC project
2042079 IP Protection IP-Protection activator: set the correct dates for WC
2042286 IP Protection Addon message incorrectly displayed on unauthorized URL paths for domain-restricted rules
2042289 IP Protection Messaging addon (infobar) is not displayed on magenta.tv when VPN is enabled during the World Cup time range
2042913 Installer Investigate the increase of removed Desktop Launchers in the metrics since Fx151
2043067 Toolbar Site navigation bar is floating when using expanded toolbar
2043569 DOM: Core & HTML Paste context menu missing in Squarespace editing interface
2043711 Experimentation and Telemetry Preserve install referrer values containing '=' characters
2043744 Experimentation and Telemetry Inject CoroutineScope into InstallReferrerHandlingService for deterministic tests
2043749 Experimentation and Telemetry Limit default Adjust third-party sharing to Google
2043755 IP Protection Check usage on IPP panel open when paused
2043999 IP Protection ipp-protection: add telemetry for the ipp-activator messaging
2044051 Layout: Form Controls Input field with resize: vertical should not be resizable
2044091 Homepage Sports widget: reorder pager cards to lead with celebrations and bracket finishers
2044150 Experimentation and Telemetry Add Reddit as new marketing partner in Adjust
2044432 IP Protection Add a Nimbus variable to set the IPP upgradeNotAvailable pref
2044439 Homepage Sports widget: throttle World Cup matches API and add Nimbus-controlled interval with mock-server bypass
2044622 Homepage [Homepage Sports Widget] [phase3] Penalty scores missing from live and ended matches
2044649 Homepage Sports widget: upcoming Final and Third Place shown first in pager during group stage
2044713 Homepage [Homepage Sports Widget] [phase3] Phase 3 card is being displayed even though there are still 3 hours left on countdown
2044955 Experimentation and Telemetry Onboarding marketing card experiment: Treatment C primary button copy update to "Allow and Continue”
2044970 Homepage [Homepage Sports Widget] [phase2] Automatically close the Country selector when a team has been selected or deselected
2044974 Homepage [Homepage Sports Widget] [phase3] [Localization] Portuguese "Full time" translation causes severe text crowding and squishes the team flag icon in the sub-matches list
2044981 Homepage [Homepage Sports Widget] [phase3] Fix Standalone error card background color
2045659 Homepage [Homepage Sports Widget] [phase3] Move australia from Asia to Oceania

Not yet shipped

Uplifts and Backouts
Bug Component Summary
2017166 Machine Learning: Frontend The Ask Sidebar button Open/Closed state is not read out loud by Screen readers
2018177 Machine Learning: Frontend [a11y] Smart window - Unable to reach the Add tabs or Ask Submit buttons using keyboard navigation after text is added to the Smart bar
2027078 JavaScript Engine Regression in Firefox 150: localeCompare(..., { numeric: true, sensitivity: 'base' }) now produces different descending order vs Firefox 149 for numeric-like values
2027788 Distributions Ignore the distribution ini file if its global.id is mozillaonline
2027928 IP Protection [a11y] Toggle state not conveyed to screen reader users
2028675 Machine Learning: Frontend [a11y] Combobox functionality not announced to screen reader users
2028677 Machine Learning: Frontend [a11y] "Memories" dialog, various barriers for screen reader users
2031577 Networking: Cache Unable to cache additional imap messages once cache2 disk cache is full
2032193 Machine Learning: Frontend Add “Use Smart Window by default” setting
2032669 Browser Engine AiChoiceBanner should use PromoCard component
2032994 Machine Learning: Frontend Add thumbs up/down feedback actions behind pref
2033595 Homepage [Homepage Sports Widget] - Create middleware, lifecycle actions and SportsWidgetRepository interface
2033599 Homepage [Homepage Sports Widget] - Real World Cup API integration
2033806 Machine Learning: Frontend The Sidebar Conversation scrolls back to the top when switching tabs
2034260 Machine Learning: General Enable semantic history search feature gate when smart window is enabled
2035450 Distributions Ignore the distribution ini file if its global.id is mozillaonline via pref
2036193 Machine Learning: Frontend [Feedback MVP] Add feedback modal for thumbs up/down
2036194 Machine Learning: Frontend [Feedback MVP] Send user feedback data via Glean
2036389 Machine Learning: Frontend sidebar smartbar @mention becomes malformed when switching tabs
2037056 IP Protection Extra large VPN Status Checkbox in Overflow Menu
2037227 Homepage Define network data models for the WorldCup matches API + JSON deserialization
2037245 Homepage "Following [Team]" card UI
2037247 Homepage Create a SportsCardPager with a 3-dot overflow menu
2037378 Machine Learning: Frontend The Assistant Sidebar reopens Automatically when switching tabs after closing it from the X Close button
2037413 Homepage Add the Sports logo to the Homepage
2037466 Homepage Update the Sports Country Selector
2037552 General Disable remaining tests running on the android P5 devices
2037816 Homepage Implement accessibility requirements for all the Sports components
2037817 Homepage Implement telemetry for all the Sports components
2037818 Homepage Update the Match Card implementation
2038262 IP Protection The VPN Get started button in settings does not work if you have removed the VPN button from the toolbar and restarted Firefox
2038467 IME Typing gets repeated when entering text 2 characters after @ in email fields
2038900 WebRTC: Audio/Video Perma dom/media/webrtc/tests/crashtests/2038533.html | single tracking bug
2038944 Machine Learning: General SmartWindow request & response ids metrics are not matching
2039070 Task Configuration Emit pernosco pulse events on most state transitions
2039097 Machine Learning: Frontend Add window resizing support for Spotlight chromeless browser
2039203 DOM: UI Events & Focus Handling [TSF][Sogou] Quickly entering "=" will cause the browser to crash
2039250 Experimentation and Telemetry [Experiment][Android] The PWA CFR message is triggered in the treatment B branch of the “Remove all CFRs” experiment
2039315 Layout number increase/decrease controls obscure the number when using field-sizing: content;
2039375 Experimentation and Telemetry Growth events should be sent even if campaign ID is empty
2039380 Homepage App crashes in private tab when sports widget feature is enabled and "new private tab entry" is disabled
2039387 Networking [macOS 26.5] Crashes [@ notify_register_check ] on macOS 26.5
2039503 Experimentation and Telemetry Update the nova_onboarding_marketing_body_5 string to include the "how we use data" link
2039504 Layout: Form Controls Inserting caret into textbox and selecting text with mouse cursor no longer work for input with ::first-line pseudo-element
2039516 Homepage Selecting the edge-to-edge from the wallpaper selection tool doesn't apply the wallpaper
2039769 Homepage [Homepage Sports Widget] - Enable pre-tournament sports widget pager with cached schedule fetch and Nimbus rollout
2039787 Tabbed Browser: Split View Split View is closed when using the switch to tab option
2039795 Tabbed Browser: Split View Split View closes when using the “Move Tab to Split View”
2039924 Bookmarks Remembered flows in BookmarksScreen remain stale even after rotation
2039970 Experimentation and Telemetry Upgrade to Adjust SDK to v5.7
2040294 Distributions Activate the ignoring of the mozillaOnline distribution
2040403 Homepage Implement error state for live matches
2040407 Homepage The first match is not displayed in an enlarged (focused) state for teams other than MEX and RSA on the Sports Widget
2040429 Homepage Change the kit logo with soccer ball
2040479 General Support updated Azure A10 WebGL renderer strings on Windows 11 25H2
2040509 Machine Learning: Frontend Add Nimbus/configuration support for Smart Window default experiment
2040620 Homepage Implement third place, Champion cards and nullable teams
2040680 Machine Learning: General Memories generation - handle budget exceeded scenario
2040693 Layout: Scrolling and Overflow FF 151.0 not correctly rendering GUI webpage for DocfetcherPro, because CSSOM `insertSheet` API throws an exception when our new partial ::-webkit-scrollbar support is present-but-disabled
2040711 Homepage [Homepage Sports Widget] - Surface tournament-winner and third-place outcomes on sports widget FINAL and THIRD_PLACE_PLAYOFF cards
2040718 IP Protection Update language referencing number of locations in ipProtection.ftl
2040721 Machine Learning: Frontend Integrate round 1 feedback UI with Glean submission flow
2040825 Homepage Show generic experience for eliminated teams and pass eliminated teams to SportsWidgetState
2040957 IP Protection Add browser.ipProtection.blockIPProtectionCallouts pref
2040979 DOM: Device Interfaces Hang when reloading a page with an active WebSerial port open
2041156 Homepage Show full schedule one date per card for no team selected
2041208 Widget: Cocoa Remove App Group Container entitlements from Release and Beta channels
2041235 DOM: Core & HTML invalid paste behavior with inputs in table > td
2041355 Downloads Downloads Settings for removing downloads is overriden when updating to Fx151
2041488 Homepage Update the stage parameters returned from the API
2041497 Messaging System write_in_microsurvey ping instructions are being forwarded in a clunky way
2041531 Homepage Display correct sports card header
2041537 Homepage Always enlarge the first matches (or all live matches) in a pager match card
2041541 Homepage Don't show group in related matches UI when past group stages
2041544 Homepage [Homepage Sports Widget] - Add mock server integration in debug tool
2041655 Homepage [Homepage Sports Widget] [phase2] The widget 3 dot menu has "Change team" item while no team is selected
2041688 Homepage [Homepage Sports Widget] [phase2] The Firefox logo does not change back to standard after the feature is turned OFF
2041691 Homepage [Homepage Sports Widget] [phase2] "country_selector_displayed" event not generated when the bottom sheet is opened from Firefox soccer logo
2041705 Homepage [Homepage Sports Widget] [phase2] No internet connection error is displayed if no team has been selected
2041811 Homepage Homepage sports debug tool improvement - add an apply button to session
2041887 Graphics: Text Crash in [@ libfontconfig.so.1] after users upgraded to fontconfig 2.18.0
2042018 Downloads Crash in [@ java.lang.IllegalStateException: at androidx.fragment.app.Fragment.requireContext(Fragment.java)]
2042035 Layout: Scrolling and Overflow Perma [mozilla-release] browser/base/content/test/static/browser_parsable_css.js | single tracking bug
2042115 Experimentation and Telemetry [Experiment][Android] The AI Controls settings page does not open, and a browser crash notification is received after tapping the AI Controls notification
2042497 Machine Learning: Frontend Remove userFeedbackCollection pref gating for Smart Window feedback UI
2042532 Messaging System Expose the count of open tabs as a global targeting attribute
2043249 Graphics: WebRender Fallback to software WebRender since Firefox 151
2043299 Homepage Suppress sports-widget error UI during one-week-to-kickoff phase when a cached schedule is available
2043307 Disability Access APIs Crash in [@ __delayLoadHelper2 | _tailMerge_uiautomationcore.dll | mozilla::a11y::uiaRawElmProvider::RaiseUiaNotificationEvent]
2043514 Homepage Update Sports Pager telemetry with source and type extras
2043585 Homepage Accept nullable teams from the API
2043663 Homepage Update Champions cads implementation
2043750 Homepage Sports widget: Champion card missing when Final/Third-Place is decided in extra time
2044131 IP Protection Add browser.ipProtection.bandwidth.enabled prefs to allowed prefs for feature callout CTA
1919387 Enterprise Policies Add Weather to the FirefoxHome policies
1922629 Graphics Update Cairo to version 1.18.4
1947679 WebDriver BiDi Allow "webExtension.install" command to install a web extension that is enabled in Private Browsing mode
1978145 Responsive Design Mode Implement dynamic toolbar on top in RDM
1990563 Accounts and Sync Evaluate implementations of CoroutineScope and replace/refactor where necessary
1996423 General Improve embedding of browser logo in generated QR codes
1997321 General Omit embedded logo when URL is too long for H-level error correction (QR codes for very long URLs)
1998050 JavaScript Engine: JIT JIT Type confusion TypedArrayElement and NativeProperty
2000469 JavaScript Engine: JIT Assertion failure: slots == calculateDynamicSlots(), at vm/JSObject-inl.h:36
2010738 Places SQL Injection in PlacesPreviews.sys.mjs deleteOrphans() via Broken Filter and malicious file created in the profile
2017261 General Compile with Android 17
2017679 SVG calc() in SVG rect x/y attributes renders incorrectly
2020725 IP Protection Allow Geckoview Access to IPProtection
2021720 SQLite and Embedded Database Bindings Upgrade to SQLite 3.53.0
2022008 Password Manager Remove Rust Login Storage Sync API Methods
2022985 Lint and Formatting Update browser-shared.css so it passes use-design-tokens
2024187 Firefox Monitor Breach alerts in trust panel
2024652 Machine Learning: Frontend The in_use value for the memory_removed_panel event is missing
2025276 Networking: HTTP Enable Happy Eyeballs on early beta
2026984 JavaScript Engine Syntax parser does not report an error for `delete this?.#x`
2027915 Migration Disable the legacy Edge migrator
2028030 Toolbar Support browser back (in toolbar and menu) for stories opened from the home screen
2028075 WebDriver BiDi [wdspec] bidi/browsing_context/reload/frame.py is not awaiting last assert
2028964 Storage: IndexedDB Investigate IndexedDB Reliability in ASRouter Use Case
2030431 Performance Add a critical desktop category for mach try perf
2030461 DOM: File Tab crash after drag-and-dropping and reading nested folder structure
2030764 Sidebar High frequency browser/components/sidebar/tests/browser/browser_bookmarks_keyboard_navigation.js | single tracking bug
2030873 New Tab Page Nova customization panel - Add in wallpaper toggle reset functionality
2031095 General QR code naming (module->dot) and test cleanups
2031280 DOM: Core & HTML ConsoleAPIStorage.recordEvent stores events for already-destroyed inner windows, causing leaks
2031381 Lint and Formatting Fix clippy warnings in toolkit/components/glean/api/src/private/labeled_timing_distribution.rs
2031686 IP Protection Expose the Server/Country Model to UI
2031687 IP Protection Allow Passing the preferred CountryCode in IPPProxyManager.start()
2031958 Audio/Video: Playback media/ffvpx/libavcodec/parsers.c:114:30: error: initialization of ?const FFCodecParser *? from incompatible pointer type
2032038 Mochitest Add retry-on-failure for mochitest in CI
2032191 DOM: Editor Text cursor (caret) disappears in Gmail compose window after inserting AI-generated text
2032196 Address Bar Search mode switcher no longer respects density settings
2032450 Distributions Distribution Customizer sending complete event only when prefs and bookmarks are applied
2032513 Machine Learning: Frontend Remove Smart Window Nova preference: `browser.smartwindow.nova` and its references
2032525 UI Tests Create a new Class (NavigationToolbarExpandedTest) with UI tests using the Expanded Toolbar layout
2032591 New Tab Page Nova - UI updates to inline topic selector
2032673 General Enable outofmemory stacktraces on all channels
2032681 CSS Parsing and Computation Enable Typed OM reification for additional style types after derive_fields switch
2032758 Source Editor SourceEditor PREF_CMNEXT_ENABLED should be tool specific
2032788 Graphics: ImageLib fix jpeg xl frame scan decodes
2032928 Android Clarify supported properties in tabs.Tab implementation on Android
2032954 Inspector: Layout Hit MOZ_CRASH(the color could not be resolved even with a currentcolor specified?) at servo/components/style/color/color_function.rs:421
2032980 DOM: Core & HTML It's too easy to miss the "press and hold esc" text in the fullscreen keyboard lock message
2032985 DOM: Events Make PBrowser::RequestNativeKeyBindings more idiomatic
2032993 DOM: Core & HTML Deduplicate fullscreen on same element WPT test
2033040 Logins Password field label does not match URL & username labels on details screen
2033072 General File path changed in logging output
2033094 Toolchains Update various toolchains
2033171 DOM: Core & HTML Perma /html/syntax/parsing/crashtests/reconstruct-active-formatting-elements-001.html | single tracking bug
2033174 Graphics: ImageLib fix testing/web-platform/tests/jpegxl/resources/conformance_alpha_nonpremultiplied.jxl to not contain unspec'ed behaviour
2033242 DOM: Core & HTML Rename ownerDocGlobal to documentGlobal, and use it in some relevant places.
2033253 Search Perma a11y-checks [tier 2] browser/components/search/test/browser/telemetry/browser_search_telemetry_sources.js | test_source_searchModeSwitcher - Node is not accessible via accessibility API: id: | single tracking bug
2033269 DOM: Events Perma macos wpt backlog [tier 2] /pointerevents/touch-action-with-swipe-dir-change.html | touch-action:auto with down,right swipe - Test timed out | single tracking bug
2033295 Graphics: ImageLib fix cmyk wpt jpeg xl reference png
2033346 New Tab Page Nova customization panel - Fix wallpapers alignment when panel is open
2033378 JavaScript Engine Telemetry callback API limits the precision of time durations
2033405 DOM: Core & HTML Clean up existing usages of MockFilePicker.init
2033422 Graphics: ImageLib add a jxl downscaling integration test
2033427 UI Tests Temporarily remove the verifyExtensionsButtonWithInstalledExtension test step
2033444 DOM: Credential Management Disable FedCM in Nightly
2033445 IP Protection Correct comments in ipProtection.ftl
2036107 Experimentation and Telemetry Update Aura Adjust settings
2039424 Experimentation and Telemetry Add new marketing partner Adjust settings
2039829 IP Protection IP-PRotection activator add-on: add VPN state and region conditions
2039866 DOM: Navigation UI hang on Windows when using back/forward buttons
2040888 IP Protection IP-Protection activator: introduce the WC tab breakage list
2041329 IP Protection IP-PRotection activator add-on: implement a date condition for the WC project
2042079 IP Protection IP-Protection activator: set the correct dates for WC
2042286 IP Protection Addon message incorrectly displayed on unauthorized URL paths for domain-restricted rules
2042289 IP Protection Messaging addon (infobar) is not displayed on magenta.tv when VPN is enabled during the World Cup time range
2042913 Installer Investigate the increase of removed Desktop Launchers in the metrics since Fx151
2043067 Toolbar Site navigation bar is floating when using expanded toolbar
2043711 Experimentation and Telemetry Preserve install referrer values containing '=' characters
2043744 Experimentation and Telemetry Inject CoroutineScope into InstallReferrerHandlingService for deterministic tests
2043749 Experimentation and Telemetry Limit default Adjust third-party sharing to Google
2043755 IP Protection Check usage on IPP panel open when paused
2043999 IP Protection ipp-protection: add telemetry for the ipp-activator messaging
2044051 Layout: Form Controls Input field with resize: vertical should not be resizable
2044091 Homepage Sports widget: reorder pager cards to lead with celebrations and bracket finishers
2044150 Experimentation and Telemetry Add Reddit as new marketing partner in Adjust
2044432 IP Protection Add a Nimbus variable to set the IPP upgradeNotAvailable pref
2044439 Homepage Sports widget: throttle World Cup matches API and add Nimbus-controlled interval with mock-server bypass
2044622 Homepage [Homepage Sports Widget] [phase3] Penalty scores missing from live and ended matches
2044649 Homepage Sports widget: upcoming Final and Third Place shown first in pager during group stage
2044713 Homepage [Homepage Sports Widget] [phase3] Phase 3 card is being displayed even though there are still 3 hours left on countdown
2044955 Experimentation and Telemetry Onboarding marketing card experiment: Treatment C primary button copy update to "Allow and Continue”
2044970 Homepage [Homepage Sports Widget] [phase2] Automatically close the Country selector when a team has been selected or deselected
2044974 Homepage [Homepage Sports Widget] [phase3] [Localization] Portuguese "Full time" translation causes severe text crowding and squishes the team flag icon in the sub-matches list
2044981 Homepage [Homepage Sports Widget] [phase3] Fix Standalone error card background color
2045659 Homepage [Homepage Sports Widget] [phase3] Move australia from Asia to Oceania
1392125 General Omitted maxResults property not handled correctly in getRecentlyClosed
1529591 Geolocation Provider Permissions API for geo not reflecting OS X 'Enable Location Services' setting
1688113 Widget: Cocoa Native themed widgets appear transparently with the non-aqua appearance
1964551 Netmonitor Intermittent devtools/client/netmonitor/test/browser_net_overrides_with_debugger.js | single tracking bug
1968116 Settings UI Convert settings related to Accessibility page to config-based settings
1978586 Raptor Add Speedometer 3 test with per-suite Simpleperf profiling
2001023 Raptor Add basic Simpleperf profiling support to Raptor
2005002 DOM: File Infer BlobURL principal from URL
2005247 DOM: File Remove direct BlobURL data look-ups, and depend on BlobURLChannel
2005698 General Provide a configure flag to trace C/C++ compiler usage
2005975 Tooling Add lint to enforce usage of compose-base IconButton
2009524 MFBT Implement fmt formatting for BitSet
2009873 Third Party Packaging Perma Snap [tier 2] test_pdf_navigation | AssertionError('Mismatching screenshots for test_pdf_<random>') | single tracking bug
2012347 Crash Reporting Crash reporter should not ask to restart Firefox after closing Firefox
2015613 Homepage Remove (activity as HomeActivity) references
2016966 Sidebar When vertical tabs are set to "Hide tabs and sidebar", hiding the sidebar will still leave behind the splitter
2017365 Raptor Add JIT symbol and marker support to Speedometer 3 Simpleperf profiles
2019561 Tabbed Browser: Split View The tabs in vertical mode collapsed state are positioned differently in Split View
2019712 Downloads Download rename: Check if rename is possible before confirming file type change
2021312 Tabbed Browser: Tab Groups Add CustomizableUI toolbar item for Tab Groups
2023457 Graphics: Canvas2D NotSupportedError when transferring an OffscreenCanvas between two Workers via MessageChannel
2023696 Installer Replace the desktop shortcut with the desktop launcher when Firefox is installed via the full installer
2023797 Design System and Theming Update info and promo cards to latest Acorn designs
2024649 Layout Remove LayoutUtils.sys.mjs
2025028 Tabs Enable Tab Groups feature in Nightly
2025069 Crash Reporting Include the StackTraces annotation in crash reports
2025448 JavaScript: WebAssembly Enhance IONFLAGS=codegen for wasm to print StackMaps and TrapSiteDescs
2026817 Machine Learning: Frontend [Nova] Update Recent Tabs panel and @mention empty state styling
2027170 Disability Access APIs Update promisified-events.js with event constants and refactor unexpected events
2027903 Translations AI Controls: Add SUMO links to learn more buttons
2028139 General Building old revision is hard
2028573 Search New entry flow into Google Lens integration
2028724 Widget: Cocoa Change native="false" to nonnative="" and treat as a bool attribute
2029027 Security Move error resolution logic from UI components to the dedicated resolution layer
2029180 UI Widgets Convert moz-box-* variables into JSON design tokens
2029181 UI Widgets Convert moz-breadcrumb-group variables into JSON design tokens
2029228 Widget: Cocoa Add pref migration to clear removed native menu prefs
2029237 Machine Learning: Frontend Disable smart cursor interaction
2029616 Browser Engine [Shake to Summarize] Error message UI does not match Figma design
2030034 Address Bar Intermittent browser/components/urlbar/tests/engagementTelemetry/browser/browser_glean_telemetry_engagement_window.js | single tracking bug
2030056 New Tab Page Add Jest tests for Nova Sections follow/block UI
2030286 Address Bar Intermittent [standalone artifact] browser/components/urlbar/tests/quicksuggest/browser/browser_quicksuggest_ping_amp.js | single tracking bug
2030296 Audio/Video: Playback [Win10] Netflix videos not rendered on HDR enabled display
2030391 New Tab Page Follow/unfollow buttons are not labeled in their default state
2030466 Top Sites Crash in [@ java.lang.IllegalArgumentException: at mozilla.components.browser.icons.extension.IconMessageKt.toJSON(IconMessage.kt:177)]
2030505 Address Bar Consider using em dash as a11y alternative for the urlbar title separator bullet
2030536 Privacy [IPProtection] Add support for data limit reached to UI elements
2030707 Task Configuration Code review bot ending task should now run on git repository
2031288 Sidebar Add ability to multiselect bookmarks in updated bookmarks panel
2031369 Lint and Formatting Fix a clippy warning in security/manager/ssl/trust_anchors/build.rs
2031407 Disability Access APIs [a11y] Dialog not programmatically identified as modal
2031447 Lint and Formatting Support configurable clippy warn/deny rules in clippy.yml
2031707 New Tab Page The Weather checkbox in about:preferences#home is not synchronized with the Weather widget toggle in the Customization Panel
2031755 Security: PSM remove unused entries from PreloadedHPKPins.json
2032154 Tabs [Tab Groups] When the first tab in a group is closed, the tab group's position in the Tabs Tray changes
2032227 IP Protection Add an IPP locations subview
2032439 Gecko Profiler Shutdown profiles drop the profile additional info
2032606 Crash Reporting Crashreporter does not register 4xx response from curl executable submission path as submission failure
2032648 Address Bar Sports suggestions: Add cricket, golf, racing, and soccer fallback icons and improve sport-to-fallback-icon mapping
2033080 Tabbed Browser Remove legacy tabbrowser probes
2033100 Address Bar Perma [tier2] browser/components/urlbar/tests/browser-searchMode/browser_searchModeSwitcher_opensearchInstall.js | Node is not accessible via accessibility API: id: main-button, tagName: button, className: | single tracking bug
2033105 General Make Thunderbird-specific codes accessible via the Cr object in JavaScript
2033111 Shell Integration [Experiment] default new Windows users to launch on login experiment doesn't mark exposure correctly
2033150 Browser Engine create bookmark file parser concept module and fake
2033165 New Tab Page Nova content feed layout does not render four column layout
2033225 JavaScript Engine Intermittent js/src/jit-test/tests/modules/bug-2027274.js | Unhandled rejection: 1 (code 3, args "--ion-eager --ion-offthread-compile=off --more-compartments") [2.5 s]
2033279 General Unable to compile SpiderMonkey using Rust 1.95.0
2033312 Top Sites Enable Merino Manifest usage in BrowserIcons in Nightly
2033313 Toolbar "Fill link from clipboard" appears with transparent background
2033339 Tabs Deleting a tab always scrolls to the selected tab
2033385 WebDriver BiDi Requesting the Geolocation now opens the system preferences on macOS since April 20th, 2026
2033388 Logins Password field is cut off in landscape on Login Details screen
2033416 Graphics: ImageLib enable now passing gtest ImageDecoderMetadata.AnimatedAVIF
2033421 General Remove some ccache special-cases.
2033426 Graphics: ImageLib Fix contract id for registering image formats that are enabled/disabled by pref
2033428 Graphics: ImageLib rename TestHDRPNGEncoder to ImageHDRPNGEncoder
2033429 Layout: Form Controls Input with accept="image/*" should allow selecting avif and jxl images
2033432 Graphics: ImageLib nsPNGDecoder interlace overflow
2033448 XPCOM Shutdown crash running intl/uconv/tests/unit/test_utf8_illegals.js with the profiler enabled on opt builds
2033469 Layout: Form Controls Autoscroll ignores textarea and scrolls the enclosing element
2033474 DOM: Core & HTML ShadowRoot can have out-of-sync internal array for adoptedStyleSheets after unlink and cause a array InvalidArrayIndex crash
2033498 UI Tests Temporarily disable verifyUBlockWorksInNormalModeTest & verifyUBlockWorksInPrivateModeTest for frequent failures
2033499 JavaScript Engine Avoid frame iteration in some common cases for Await skipping
2033530 Release Automation RuntimeError: Cron jobs ['run-missing-tests'] couldn't be triggered properly. Reason(s): * "run-missing-tests": "'schema'"
2033624 Panning and Zooming Remove ScrollDelegateChild global check.
2033651 PDF Viewer Update PDF.js to new version ab85b7f0ff8be850071a662c66f2f3ebec180523 from 2026-04-20 19:21:29
2033659 Graphics: ImageLib testing/web-platform/tests/jpegxl/imagedecoder-animation.https.html expects all frameCount to be finished before the decoder is complete
2033691 Accessibility Tools Temporarily delay toolbox opening for accessibility panel tests
2033717 Password Manager Remove ohttp ping tests for LoginManagerRustMirror
103422 Widget: Cocoa Support selection by paragraphs (option+up/down arrow) in Caret Browsing mode
1240539 Widget: Cocoa Populate WidgetEvent's timeStamp with data from NSEvent.timeStamp
1652123 Task Configuration Replace voluptuous for schema validation in taskgraph.
1828887 Audio/Video: Playback Intermittent Assertion failure: mTaskQueue && mTaskQueue->IsCurrentThreadIn(), at /builds/worker/checkouts/gecko/dom/media/platforms/wmf/MFMediaEngineStream.cpp:520
1846184 Enterprise Policies Pressing Tab unexpectedly focuses on a vertical line on 'about:policies#documentation' page
1861868 Installer MSI installer triggers UAC prompt for gibberish filename like `e3afe72.msi`, for Firefox and Mozilla VPN msi installers
1876948 DOM: Core & HTML Intermittent /html/dom/render-blocking/remove-attr-stylesheet-link-keeps-blocking.html | single tracking bug
1887297 Audio/Video: Playback Intermittent Assertion failure: mState.IsReadingMetadata() || mState.IsRunningEngine() || mState.IsSeekingData(), at /builds/worker/checkouts/gecko/dom/media/ExternalEngineStateMachine.cpp:725 | single tracking bug
1898041 JavaScript: WebAssembly Expand test coverage of wasm code on suspendable stacks
1908266 Audio/Video: Playback Frequent dom/media/test/test_eme_mfcdm_generate_request.html | single tracking bug
1974365 Audio/Video: Playback Intermittent Hit MOZ_CRASH(MozPromise::ThenValue created from 'RecvFlush' destroyed without being either disconnected, resolved, or rejected (dispatchRv: not dispatched)) at /builds/worker/workspace/obj-build/dist/include/mozilla/MozPromise.h:532
1979253 Disability Access APIs Perma Android AArch64 debug PROCESS-CRASH | MOZ_ASSERT(hyperAcc) [@ mozilla::a11y::TextLeafPoint::GetTextAttributesLocalAcc] | dom/media/webvtt/test/mochitest/mochitest.toml | single tracking bug
1982226 DOM: Core & HTML Intermittent /html/semantics/forms/the-select-element/list-box-important-colors.html | single tracking bug
1993844 Sidebar Incorrect Sidebar button state/tooltip hover text
2001328 Profile Backup Existing backups are not autodetected if user signs in to OneDrive after a backup was previous made in the default location
2002387 mozperftest Adjust error bound for startup to better capture chrome startup on the P6
2002444 Graphics: WebRender Add a way to dump the WebRender spatial tree in release builds by flipping a pref
2005912 Tabbed Browser Tab note icon color is inconsistent with theme
2006310 Mozbase Running mach test after adding a test fails and requires rebuilding
2011532 web-platform-tests Intermittent /fedcm/fedcm-login-status/cross-origin-status.https.html | single tracking bug
2012902 Widget: Cocoa Windows open on main display rather than focused display on Mac
2017179 Downloads Unable to rename a downloaded file to uppercase (or lowercase)
2021618 General Geckoview's DelayedInit queue isn't processed till the end if a queued init errors
2023419 Developer Environment Integration Remove Emacs/Vim modelines to use .editorconfig
2025368 Privacy Add telemetry for Trackers Blocked widget
2025617 Sharing Content Sharing helper to check auth state before sharing
2025987 Release Automation Update Direction on WNP update launch from Mozilla.org to Firefox.com
2026331 Privacy: Anti-Tracking explanatory header of SmartBlock original embed content is not translated
2026396 Machine Learning: General Make table instructions configurable via pref
2026838 Machine Learning: Frontend Pass model names instead of numbers in switcher events
2026849 Shell Integration Metrics for Windows Search navigations
2027060 Sidebar Keep vertical split view tabs stacked vertically even when the sidebar is expanded when expand on hover is enabled
2028208 Try Support passing try config via Git notes
2028364 Firefox [RelaunchRequired] Restart is not enforced after the time set in the policy has passed on macOS with lockscreen enabled
2029059 General `./mach test` doesn't support Fenix longfox submodule tests
2029190 UI Widgets Convert moz-promo variables into JSON design tokens
2029560 Homepage Remove navigation bar XML from the Homepage
2029607 Onboarding Offer to install addon if Fenix was installed from an AMO page
2029864 Layout: Block and Inline Adjust WPTs and reftests for improved robustness to vertical font metrics changes
2029867 Layout: Block and Inline Unify synthesis of margin-based and content/padding/border-based box baselines
2030006 Audio/Video: Playback Don't warn in gtest when brand name URL cannot be resolved
2030045 New Tab Page Incorrect card type detection in telemetry for small and large cards if NOVA is enabled
2030425 JavaScript Engine Extend PlainObject SetProp/SetElement fastpaths to NativeObjects when possible
2030602 Homepage Migrate Snackbar handling in the Homepage to Compose
2030667 Onboarding Refactor MarketingAttributionService to allow reusing it for RTAMO
2030671 Onboarding Get the download URL of a RTAMO addon
2030692 Onboarding Collect telemetry RTAMO telemetry
2030769 Source Code Analysis Add a clang plugin to check WeakPtr cycle collection
2030849 Homepage Remove wallpaperImageView from the Homepage Fragment
2030866 Homepage Handle wallpaper load failure in the Compose Wallpaper
2031200 JavaScript Engine Consider factoring out the module-specific part of LoadedScript/ModuleScript into separate class
2031507 Graphics Skia Lanczos3 downscaling: fix rounding bug
2031594 Networking Persist TLS session token cache across restarts when network.process.enabled=true
2031648 Machine Learning: Frontend Cancel pending sidebar starter inference on disconnect to prevent window leak
2031968 Networking: DNS Potential deadlock in DNS resolution
2031971 IP Protection Implement an IP Protection Auth Provider to support the new guardian auth flow
2032173 IP Protection Dismiss infobar and in-panel warnings in all windows if dismissed in active window
2032181 Browser Engine [Shake to Summarize] Use page title as the title of the summary
2032368 Widget: Gtk Fix DRMFormat::UseModifiers() to correctly manage DRM_FORMAT_MOD_INVALID
2032369 Widget: Gtk DBusService error handling update
2032605 IP Protection Add conditional attention dot to IP Protection toolbar button
2032635 Layout: Positioned Fix first subtest in anchor-getComputedStyle-002.html (relating to anchor positioning with multicol fragmentation)
2032654 Performance Run macOS arm64 pageload tests on autoland
2032657 Try Improvements for mach try chooser
2032675 Disability Access APIs Don't create Accessibles when CSS alt content is empty
2032760 General 350.43 - 288.04% compiler warnings + 1 more (OSX) regression on Thu April 16 2026 (because third-party-path warning detection assuming absolute paths)
2032770 SVG Update implementation of deselectAll
2032929 Settings UI Settings > Applications is not displayed properly when the browser is resized to the minimum width
2033009 Design System and Theming Upstream ListItem component from Fenix to compose-base
2033125 web-platform-tests Intermittent /navigation-api/navigate-event/navigate-form-onformdata-navigate-crash.html | single tracking bug
2033134 UI Tests Perma [tier 2] mozilla.components.lib.crash.service.GleanCrashReporterServiceTest#gleanCrashReporterServiceReadsExtras | org.junit.ComparisonFailure: expected:<[d462c4b4-a9f8-4244-b526-7435fcdc4403]> but was:<[a7b9a249-a4d6-4f26-bb8b-99dcfd6b27ce]>
2033187 Address Bar Intermittent browser/components/urlbar/tests/browser/browser_suppressFocusBorder.js | single tracking bug
2033278 Lando Simplify the output of "mach try"
2033286 SVG Update SVGStringList parsing for latest SVG 2 spec changes
2033354 Graphics: WebRender Remove legacy box-shadow clip-mask path
2033366 UI Tests Fix ComposeNotIdleException when verifying the extensions button when an extension is installed
2033384 Layout congresoseed.com - Page header does not have a fixed position and disappears when scrolling
2033415 Tabbed Browser Tab notes icon hard to see with dark themes
2033461 UI Tests Update the verifyTheToolbarLayoutSectionTest UI with a new toolbar shortcut option
2033491 Gecko Profiler `ChromeUtils.addProfilerMarker` crashes when passed a non-plain object as the data argument
2033513 Request Handling Misleading comment "RequestBody is disabled in release builds."
2033564 GTest Update googletest to new version d72f9c8aea6817cdf1ca0ac10887f328de7f3da2 from 2026-03-31 14:22:05
2033572 SVG If an ellipse is actually a circle then draw a circle
2033585 Gecko Profiler AnimationEventInfo::MaybeAddMarker could crash when the profiler doesn't have a timestamp assigned
2033601 Tooling Update Protobuf Gradle Plugin to version 0.10.0
2033611 Nimbus Desktop Client Firefox Labs opt-in list cleared at first startup
2033639 Disability Access APIs Hide about:support instantiator row when a11y is not enabled
2033640 Audio/Video: Playback [wmfme] Fix MF_E_INCOMPATIBLE_SAMPLE_PROTECTION (0xC00D7176) error
2033656 General Remove usage of empty AndroidX KTX modules
2033692 General Update android nightly application-services version bump to new version 5dab154af8fd7bf29f5fddcb2a54e3a4c31de98e from 2026-04-21 05:02:39
2033705 DOM: Core & HTML Consider to have a longer timer value for Fullscreen warning autohide when keyboard is locked
2033728 IPC Use WebIDLEnumSerializer where possible
2033774 Tooling Make example code in the android-new-module skill an optional step
2033785 Top Sites Shortcuts icon improvements
2033787 General Start the nightly 152 development cycle
2033840 DOM: Navigation Extend GWT RichTextArea compat hack to the Editor version in Polarion
1339203 WebRTC: Networking RTCPeerConnection does not support setting rtcpMuxPolicy parameter
1844127 Places Stop using NetUtils in Places unit tests
1893083 Address Bar Implement the context menu on urlbar results
1899266 Graphics: WebRender Make ScaleOffset::(un)map_rect() operate on min and max points rather than origin and size
1935557 DOM: Animation [web-animations-1] Add a pseudoElement option to the element.getAnimations() dict arg.
1955325 Themes Create opacity tokens
1959931 DOM: Notifications Ship notification action support
1973525 General Running a specific test copies all test files from the src to the obj dir before starting the test
1978300 Experimentation and Telemetry Missing setViewCompositionStrategy() when ComposeView used in a Fragment
1980803 General TS types for enum members on the Ci namespace are potentially undefined
1986614 Networking Enable shutdown tasks for nsStreamTransportService.
1989708 Privacy: Anti-Tracking Intermittent toolkit/components/antitracking/test/xpcshell/test_purge_trackers.js | single tracking bug
1995712 Tabbed Browser: Split View Infobar is displayed above both views instead of the expected one
2001938 DOM: Core & HTML docs.google.com - Ctrl+F5 in Google Slides to present in full screen is blocked
2002660 Protections UI Fix browser_toolbarKeyNav.js to work with trustPanel enabled
2002662 Protections UI Fix browser_sync.js to work with trustPanel enabled
2002668 Protections UI Update browser_aboutNetError_blank_page.js to work with trustPanel enabled
2009064 Address Bar Update urlbar icon as user types
2011859 Remote Settings Remove usage of /records endpoint
2015706 Networking Add more ergonomic C++ SFV bindings
2015814 AI for Development Codex fails to list skills from the firefox repository
2018669 CSS Parsing and Computation [css-anchor-position-1] Unitless 0 in anchor fallback fails to parse in `calc()` function.
2019625 Mochitest Screen capture/media stream failures on macOS 15 AArch64 Shippable
2021198 Autofill Sync addresses is out-of-sync with synced preferences
2024049 CSS Parsing and Computation Invalidate from changing relative properties in style container queries
2025615 Sharing Content Sharing helper to transform shared URLs and titles into valid content share request schema
2026040 Tabs [TabGroups Tab Page] Create the list layout
2026153 JavaScript Engine Make the JitCode pointer permanently weak in JitcodeGlobalEntry
2027189 Disability Access APIs Promisify events a11y mochitests.
2027190 Disability Access APIs Promisify treeview.js and actions.js and convert dependent tests.
2027911 Homepage When tapping Private Browsing button on home-screen, the homescreen UI jumps upwards for a moment (causing visual jitter and possible mis-directed taps)
2028718 Search [Search Optimization] - Parse and handle error responses from Merino
2029191 UI Widgets Convert moz-reorderable-list variables into JSON design tokens
2029229 Machine Learning: Frontend Enable back/forward navigation across Smart Window states
2029378 Toolbar Datepicker dialog causes Firefox canvas to go off screen on "notch" phones
2029505 IME GBoard gestures (cursor control/swipe-to-delete) fail to work on DuckDuckGo search input in Firefox for Android
2029629 JavaScript Engine Implement Error.stackTraceLimit
2029697 Preferences about:preferences default-browser "kit" images (kit-concerned.svg/kit-happy.svg) cause layout shift on first load of preferences page
2030630 Agent Disable captive portal detection in RecommendedPreferences.sys.mjs
2030652 Privacy: Anti-Tracking Screen reader does not capture the reduce protection infobar only the buttons
2030746 DOM: Editor Add WebIDL bindings for EditContext
2030776 CSS Parsing and Computation View Transition API: Skipped view transition due to hidden new element
2030827 Android Studio and Gradle Integration Move post-staging packaging steps from stage-package to prepare-package in packager.mk
2031052 General Make some .hgignore entries proper regex
2031220 Inspector: Rules Move handling of attr() to OutputParser#onCloseParenthesis
2031544 IP Protection Show site exclusion confirmation hint once per excluded site
2031669 New Tab Page Customize this page pencil button is not displayed according to the nova figma design
2031978 Networking: Cookies WPT cookieStore.set with public suffix domain fails
2032384 General Perma [tier 2] Linux M-a11y-checks devtools/client/application/test/browser/browser_application_panel_debug-service-worker.js | We expect at least one assertion to fail because this test file is marked as fail-if in the manifest.
2032452 Profile Backup Enable fxbackup on all platforms
2032512 JavaScript Engine Assertion failure: !js::UninlinedIsCrossCompartmentWrapper(this), at /builds/worker/checkouts/gecko/js/src/vm/JSObject.h:437
2032517 SVG Fix ellipse tests in SVGGraphicsElement.getBBox-03.html
2032547 Address Bar Enable adaptive autofill on Nightly
2032644 Netmonitor Intermittent devtools/client/netmonitor/test/browser_net_sse-basic.js | single tracking bug
2032821 JavaScript Engine `JSOp::ArgumentsLength` specialization returns wrong value for block-hoisted `function arguments(){}`
2033065 Tabs [Tab groups] Decrease left/right padding on Create / Edit bottom sheet
2033073 Networking Secure Connection Failed when loading wikipedia.com
2033124 JavaScript Engine: JIT Improve inlining of folded stubs
2033126 Bookmarks Define BookmarksFileImporter interface and provide dummy implementation
2033198 DOM: Security Perma [tier2] wpt backlog | TEST-UNEXPECTED-PASS /upgrade-insecure-requests/gen/iframe-blank-inherit.meta/unset/iframe-tag.https.html
2033370 Layout: Text and Fonts Update harfbuzz to new version 14.2.0 from 2026-04-20 05:10:48
2033372 JavaScript Engine Testcase with maps and bound functions has continuous invalidations without bailouts.
2033438 Distributions distribution.sys.mjs attempts to call `get` on `nsIPrefBranch` which doesn't exist
2033550 Audio/Video: Playback Update aom to new version 653d1049ba8833ad8f50288a7e91a313c5e00f33 from 2026-04-20 00:00:00
2033686 Disability Access APIs Add guidelines for new contributors
2033698 Address Bar Intermittent browser/components/urlbar/tests/browser-searchMode/browser_searchModeSwitcher_searchMode.js | single tracking bug
2033732 DOM: Editor Contenteditable is not editable when inside <output> element
2033755 Experimentation and Telemetry [Android Pref] Unenrolling from a pref experiment causes rollouts targeting the same pref to also unenroll
2033764 UI Tests Remove duplicate Composable Toolbar 2025 related UI tests
2033769 Marionette Ignored error in "WebDriver:Navigate" and "WebDriver:Refresh" when triggering the actual navigation fails
2033773 Inspector shape-outside value with shape function has empty button in computed panel
2033775 Machine Learning: General AIChatMessage#isSettingsURL throws a runtime error when parsed url is null
2033782 Inspector: Rules @container tooltip text doesn't have enough contrast in dark mode
2033802 JavaScript: GC Assertion failure: js::CurrentThreadCanAccessRuntime(runtime_) @ js/shadow/Zone.h:79
2033837 Layout Remove `css-gap-decorations` docs under `layout/docs`
2033925 Protections UI Dont set pref for trustpanel enabled tests
2033927 New Tab Page Newtab Nova privacy link color and focus styling fix
2033949 Graphics: WebRender Move clip size from template to instance
2033954 PDF Viewer Update PDF.js to new version fe48736846e2043696738bd54435ebb5ab24ecff from 2026-04-21 18:21:12
2033976 DOM: Core & HTML Remove unused PLUGIN_DLF_CONTRACTID and related cleanup
2033988 General Update android nightly application-services version bump to new version 1b4d64ad93e05a15cd6fbdf73b2c2d0c8603acec from 2026-04-22 05:02:18
2034040 General Use moz-src for customkeys
2034041 DOM: Events Fullscreen keyboard lock checks are wrong in presence of Shadow DOM.
2034054 JavaScript: GC Tidyups around buffer allocator sweeping
2034069 Graphics add test for bug 2027269
2034098 New Tab Page Adjust Sponsored tile character count
2034122 Machine Learning: Frontend The Ask a chatbot option is displayed when the user right clicks inside the Ask Assistant sidebar
2034141 Experimentation and Telemetry Incorrect ping for attribution data specified in metrics yaml
13607 Networking: File "file:///" shows blank page instead of root (Win)
999011 Mozbase [mozprocess] Windows "IO Completion Port unexpectedly closed" error
1875083 Firefox View Create test to ensure maxRenderCountEstimate is never being set to Infinity in virtual-list component in Fx View
1899486 DOM: UI Events & Focus Handling Intermittent dom/events/test/test_auxclick_autoscroll_off.html | single tracking bug
1974041 Enterprise Policies Refactor isInstalledByEnterprisePolicy to possibily be in AddonManager so it doesn't have to be in two places
1983408 Inspector: Rules Clicking on any swatch while having property value editor active with an unselected autosuggestion removes overridden status from all properties
1989632 Places Make ConcurrentConnection properly thread-safe
1991653 SVG Intermitent [Tier 2] layout/svg/crashtests/1758029-1.html | single tracking bug
1999625 Graphics: WebRender [Linux] Fails to build glsl-optimizer/include/c11/threads_posix.h:69:25: error: conflicting types for 'once_flag'; have 'pthread_once_t' {aka 'int'}
2007432 Downloads Share PDF behaves differently depending on if it is local/remote. Shares link if remote, file if local. Add ability to share as a file for remote PDFs.
2008119 New Tab Page Button accessible name does not convey its function: missing topic context (Settings dialog > Topics dialog > buttons Following/Unfollow/Blocked/Unblock)
2010349 Machine Learning: Frontend Add "Open in New Smart Window" to context menu
2015818 Inspector: Rules Support nested attr() in modern syntax
2019445 Tabs [Tab Group Creation] Derive a default tab group color from the existing tab group state
2019631 Mochitest Canvas ImageBitmap failures on macOS 15 AArch64 Shippable
2019822 Tabs [Drag and Drop] Basic Gesture Implementation with Drop Callback
2020302 Agent Explicitly check for the maximum screenshot dimensions
2021973 Machine Learning: Frontend implement "Search With" submenu for Smartbar CTA button dropdown
2022326 UI Widgets moz-button with accesskey label becomes corrupted when l10nId updates dynamically
2023410 Lint and Formatting mozlint: allow some linters to be written in Rust
2023411 Lint and Formatting mozlinter: port some linters to Rust
2025329 Widget: Gtk [Wayland] Re-implement back Wayland custom/specific clipboard and D&D handlers
2025620 Sharing Content Sharing helper function to display content share modal
2025725 Search [Search Optimization] Implement Sports Card design improvement
2025779 JavaScript: Standard Library Implement iterator includes proposal
2025876 Privacy Make Trackers Protection widget have rounded corners on click
2026701 Networking netwerk mutexes lack thread-safety annotations
2026733 Privacy: Anti-Tracking Populate content classifier lists from remote settings
2026836 Site Identity Misleading description of HTTPS with self-signed certificate in TrustPanel
2027123 UI Widgets moz-radio disabled state cannot be changed while the moz-radio-group is disabled
2028843 Graphics: Color Management [HDR] Combine the various prefs that enable HDR video and add a force_enabled pref for testing on non-HDR displays (especially useful for reftests probably)
2029193 UI Widgets Convert moz-visual-picker-item variables into JSON design tokens
2029973 JavaScript Engine Support scalar replacement for Date objects
2030209 New Tab Page Refactor weather error message state for Nova
2030210 New Tab Page Refactor weather location search UI for Nova
2030657 General vendor latest a-s
2030778 Search [Search Optimization] Add extra type for search optimization telemetry
2030833 Android Studio and Gradle Integration Error out when extra packaging archives would be empty
2030839 Netmonitor Intermittent devtools/client/netmonitor/test/browser_net_frame.js | single tracking bug
2031023 Theme Toolbarbutton icon xul:image overflow-clip-margin should be border-box
2031078 JavaScript Engine Stop collecting delazification and clear the stencil reference on memory pressure
2031712 Mach Core ./mach try fails to create the patch on git topic branches
2031802 IP Protection Add location selection button to VPN panel
2031818 Homepage Add UI components for building the Homepage Sports Widget
2031942 General "Observed 0 crash dump(s)." despite crash dumps existing in test_ext_storage_session_on_crash.js and test_ext_background_early_shutdown.js
2032029 Task Configuration optimize chunking transforms
2032350 WebRTC: Networking Intermittent Assertion failure: on, at ./../../../../../../../checkouts/gecko/dom/media/webrtc/transport/ipc/StunAddrsRequestParent.cpp:X
2032610 Security: PSM Upgrade Firefox 152 to NSS 3.124
2032627 DOM: Notifications NotificationParent applies child-supplied actions without checking dom.webnotifications.actions.enabled pref
2033020 Lint and Formatting Remove the no-default-lib directive from the TypeScript dom types
2033055 UI Widgets "Update Add-ons Automatically" menu item does not have checkmark any more
2033138 IP Protection Location button in main panel opens location picker subview
2033180 Graphics: Color Management [HDR/Windows] Gracefully fall back on BT2100 HLG failures in VideoProcessorBlt
2033231 Address Bar Middle clicking alternate engines no longer perform a search on the current search bar text in a new tab
2033390 web-platform-tests Update web-platform-tests to 418cb1de0634768040203359a6b221bb4f6f24f1
2033395 Raptor Raptor browsertime on macOS x86_64 fails to process crash stacks due to wrong minidump-stackwalk fetch
2033441 Privacy: Anti-Tracking Reduce Page Protection: Don't show in perma private browsing mode
2033559 General fix perf regression in get_runtimes
2033596 New Tab Page Perma [tier 2] browser/extensions/newtab/test/browser/browser_customize_menu_content.js | test_render_customizeMenu - Uncaught exception in test - TypeError: can't access property "MutationObserver", subject.documentGlobal is undefined
2033668 Graphics: ImageLib Add jpeg xl tests and testcases to our gtests to bring it roughly to parity with other image formats
2033669 Homepage Add error info cards for the Homepage sports widget
2033672 Graphics: ImageLib add gtest perf tests for jxl
2033682 Homepage Add a "Follow another team" banner for the Homepage Sports Widget
2033716 General Linux asan builds have very high cache miss rates on sccache
2033743 General SharedArrayBuffer is available to content scripts, even on pages without crossOriginIsolated
2033801 JavaScript Engine: JIT MOZ_CRASH(Invalid register) @ JitFrames.cpp:2576
2033804 IP Protection Create an IPProxyManager::switch function.
2033888 Settings [Settings Search follow up] Add AI controls to settings search
2033938 Audio/Video: cubeb Update audioipc to 57d82a9e0a389e4ad8a029ec6ba6a7920c67d631
2033982 General Remove unused include of <iostream>
2033983 General Remove unused include of <wchar.h>
2034025 Settings UI preferences-default-zoom-label needs a new ID or to have accesskey attribute restored
2034044 JavaScript Engine: JIT Handle secondary veneers consistently and account for deadlines before emitting branches
2034064 JavaScript Engine: JIT Change AssemblerBufferWithConstantPools member variables to compile-time constants
2034135 Experimentation and Telemetry Remove the Encourage Use of Search experiment
2034145 New Tab Page Newtab Wallpapers user pref was flippd to false
2034163 General Don't tell agent how to override when ignoring subdirectories
2034177 Privacy: Anti-Tracking Annotate browser_usercharacteristics_linux_distro.js with run-if instead of skip-if to mark as explicitly platform-specific
2034194 Documentation Remove outdated mention of perma private browsing not having service worker enabled
2034221 Graphics Clean up a couple lingering issues from the Cairo 1.18.4 update
2034232 WebRTC verify_vendoring should skip merge commits when offering guidance
2034234 Audio/Video: Playback Update nestegg to new version 405fdae0802b9d6aa0c7937dbc660da197164980 from 2026-04-22 20:20:19
2034241 Audio/Video: cubeb Update libcubeb to a37dadd1ed5949ab0accd7087b7c5c57800eab43
2034323 JavaScript: Debugger API Set BUG_COMPONENT for Debugger API component
2034449 UI Tests Temporarily disable "Tab saved" snackbar check from saveTabToExistingCollectionUsingTheAddTabButtonTest UI test
2034510 Audio/Video Use MakeInclusiveEnumeratedRange for MediaDataDecoder::PropertyName iteration
2034530 Experimentation and Telemetry Third party sharing configuraiton should be done before Adjust SDK initialization
2034535 Homepage Add the latest round of string changes for the Homepage Sports Widget
2034544 Layout: Text and Fonts Avoid flushing nsFontCache during servo traversal
833462 DOM: Networking EventSource (SSE) throws JS error on page reload
1745057 Internationalization Remove unused Calendar::GetLegacyKeywordValuesForLocale
1830314 UI Tests Intermittent UI test failure - < SitePermissionsTest.blockAudioAutoplayPermissionTest >
1873954 Firefox View Add test for sync admin disabled to browser_syncedtabs_errors_firefoxview.js
1990961 Settings UI Convert Firefox Updates section to config-based prefs
2004793 General getSelectedLocale spends time sorting locales unnecessarily
2016401 Lint and Formatting Upgrade to TypeScript 6
2016498 MFBT Integer overflow issue in Span::Subspan
2017234 Crash Reporting Wrong number in the info bar about unsent crash reports
2017252 WebDriver BiDi Override download target folder with "browser.setDownloadBehavior" before temporary download file is created
2021512 Settings UI Write test to ensure search suggestion settings are not visible when `browser.urlbar.quicksuggest.enabled` is `false`
2021722 Audio/Video: Playback Add Vulkan Video path to FFmpegVideoDecoder in Firefox
2022977 Lint and Formatting Update menu.css so it passes use-design-tokens
2027747 General Build tasks are not generating the same logs on retriggers/reruns versus original runs
2027842 Site Permissions Intermittent TV TEST-UNEXPECTED-TIMEOUT | browser/base/content/test/permissions/browser_temporary_permissions_api.js | Test timed out
2028797 Networking Probe for and enable Apple fast UDP datapath (sendmsg_x/recvmsg_x)
2029221 Tabs [Tab Groups] Add Glean telemetry probes for tab group interactions
2030531 Privacy [IPProtection] Address bar pill animation for every protection state
2030772 Sidebar Intermittent [TV] browser/components/sidebar/tests/browser/browser_bookmarks_keyboard_navigation.js | test_arrow_up_enters_previous_expanded_folder - Test timed out
2031489 JavaScript Engine: JIT Load baseline warmup threshold from JitScript
2031499 Machine Learning: Frontend Add “thinking” state for natural language tab actions
2031528 Machine Learning: Frontend Smart Window shows no error when Fastly WAF blocks a request with HTTP 406
2031571 JavaScript Engine: JIT Enable self-hosted baseline cache by default
2031647 Networking: Cookies TSAN: data race in mozStorageConnection::getAutocommit() vs setClosedState() during CookiePersistentStorage shutdown (test_cookies_purge_counting.js)
2031789 Tabbed Browser Tab menu context has duplicate access key `u` for `Unload Tab` and `Close Duplicate Tabs`.
2031844 Raptor Increase max window for alerting on sp3 tests
2031856 Machine Learning: On Device PipelineOptions compares all fields including metadata, causing unnecessary engine replacement
2032607 New Tab Page Update to "Fresh new" wallpapers Message
2032614 Security: PSM The mach nss-uplift command should give an option to automatically create the bug for the next release
2032780 Machine Learning: General InferenceSession: intraOpNumThreads silently ignored — SetInterOpNumThreads called twice
2033147 DOM: Web Authentication WebAuthn getClientCapabilities should return true for largeBlob on android
2033420 WebRTC Implement RTCEncodedFrameMetadata.receiveTime
2033501 General Perma beta [tier 2] build/test/python/test_android_gradle_build.py::test_mach_tasks_up_to_date TEST-UNEXPECTED-FAIL | single tracking bug
2033562 Performance: General Update xsimd to new version 7c9611e4cf3bc364e36012c0a8b97920302fdcad from 2026-04-20 06:11:03
2033700 DOM: Device Interfaces Set BUG_COMPONENT for MIDI
2033730 Disability Access APIs Intermittent TV accessible/tests/browser/e10s/browser_caching_attributes.js | This test exceeded the timeout threshold. It should be rewritten or split up. If that's not possible, use requestLongerTimeout(N), but only as a last resort. Test ran fo
2033792 JavaScript Engine stack-overflow @ vm/Shape.cpp:1110 in SetObjectIsUsedAsPrototype
2033862 Address Bar "New" badge doesn't show anymore on new built-in engines in the search mode switcher
2033894 Toolbar Remove new toolbar CFR
2033948 Machine Learning: Frontend Build selectable tab row for disambiguation
2033957 JavaScript Engine Perma esr140 js/src/jit-test/tests/debug/Frame-environment-09.js | /builds/worker/checkouts/gecko/js/src/jit-test/tests/debug/Frame-environment-09.js line 19 > eval:2:12 ReferenceError: AsyncDisposableStack is not defined | single tracking bug
2033986 General Remove unused include of <queue>
2033987 General Remove unused include of <inttypes.h>
2033989 General Remove unused include of <stdio.h>
2033990 General Remove unused include of <thread>
2033991 General Remove unusued include of <chrono>
2033992 General Remove unusued include of <deque>
2033995 MFBT Remove unused include of <bitset>
2033996 General Remove unused include of <mutex>
2033997 General Remove unusued include of <functional>
2033998 General Remove unusued include of <atomic>
2033999 General Remove unused include of <iomanip>
2034000 General Remove unusued include of <stack>
2034001 General Remove unused include of <ctype.h>
2034002 General Remove unused include of <locale.h> and <locale>
2034003 General Remove unused include of <algorithm>
2034004 General Remove unused include of <variant>
2034006 General Remove unused include of <regex>
2034007 General Remove unused include of <codecvt>
2034008 General Remove unused include of <random>
2034010 General Remove unused include of <exception>
2034083 Site Permissions Permission prompts replaced by a new prompt with the same ID leave the original request dangling
2034116 Lint and Formatting Update checkRootOnly.js plugin for TypeScript to work with 6.0
2034254 Tooling Pick up 2026-04-22 AndroidX dependency bumps
2034281 Graphics: WebRender Use recycled buffers for scratch instead of bytemuck
2034283 Graphics: WebRender transform-style: preserve-3D does not preserve as expected in vers. 150+
2034308 Search Remove or update metrics expiring at the end of Firefox 152: browser.searchinit.engine_invalid_webextension
2034312 Address Bar Remove or update metrics expiring at the end of Firefox 152: suggest_relevance.*
2034376 Disability Access APIs Use MOZ_DEFINE_ENUM for AccType
2034408 Graphics: ImageLib jxl cms should round when converting to int, not truncate
2034467 Gecko Profiler Crash in `AutoProfilerStyleMarker` when profiling with SVG feImage filter
2034481 General Fenix crashes on launch on Automotive emulator API 33
2034532 Telemetry It seems as though test_mirrors isn't running as often as it ought
2034540 Networking Stop throwing when decoding regular brotli without a channel
2034556 XPCOM Cleanup no longer existent nsRegistry.cpp externs
2034573 Layout: Form Controls input element's default string value is shifted down
2034576 Lint and Formatting ./mach lint --linter glean-parser complains about expired metrics
2034587 Networking Intermittent SUMMARY: ThreadSanitizer: data race /builds/worker/workspace/obj-build/netwerk/test/gtest/./../../../../../checkouts/gecko/netwerk/test/gtest/TestDNS.cpp:X:7 in TestDNS_ResolveHostCallbackCanReenterResolveHost_Test::TestBody()
2034592 Tooling Update Kotlin to version 2.3.21
2034593 Tooling Update KSP to version 2.3.7
2034594 Crash Reporting Update Sentry to version 8.40.0
2034743 Places Avoid replacing favicons database if it's not corrupt
2034784 PDF Viewer Update PDF.js to new version 4489c4106ae9f69776e1fb516874e23dd86f4c9e from 2026-04-24 08:13:55
2034805 web-platform-tests Perma /jpegxl/canvas-decode-paths.html | Testing http://web-platform.test:8000/jpegxl/canvas-decode-paths.html - when Gecko 152 merges to beta on 2026-05-18
2034806 web-platform-tests Perma /jpegxl/canvas-decode-paths-webgpu.https.html | WebGPU copyExternalImageToTexture path with JPEG XL image. - when Gecko 152 merges to beta on 2026-05-18
2034807 Gecko Profiler False -Wnonnull warnings from BaseMarkerType::MarkerTypeDisplay for markers that leave label fields null
2034819 DOM: Security Perma backlog [tier 2]/content-security-policy/inside-worker/dedicatedworker-connect-src.html | Reports match in http: with connect-src 'self' - Test timed out | single tracking bug
2034825 Graphics: WebRender Crash at wrshell startup
2034858 Graphics: WebRender wrshell fails to compile on windows
1894515 Raptor Remove some subtest metrics from the SP3 test
1933375 SQLite and Embedded Database Bindings Firefox sometimes spams some log output pointing to http://mzl.la/1FuID0j which is a Page-not-found MDN page
1941055 Audio/Video Intermittent application crashed [@ mach_msg2_trap] | single tracking bug
1957746 geckodriver All the WebAuthentication related commands are broken
1968394 Audio/Video: Playback Intermittent FATAL ERROR: AsyncShutdown timeout in profile-before-change Conditions: [{"name":"GMPServiceParent 0x137c32240","state":"(none)","filename":"/builds/worker/checkouts/gecko/dom/media/gmp/GMPServiceParent.cpp","lineNumber":1884,"stack":""}] At
1988861 CSS Parsing and Computation Manifest related failure /css/CSS2/generated-content/quotes-applies-to-004.xht | single tracking bug
2001565 Networking Widespread PR_END_OF_FILE_ERROR on multiple websites (openguessr.com, radiorecord.ru) in Firefox 145.x
2008197 New Tab Page Disclosure button expanded/collapsed state not programmatically defined (Customize button)
2013481 Console Support Auto completion for CM6
2013978 New Tab Page Refactor widgets render logic to programmatically determine widget list instead of hardcoded logic
2014160 Networking: Cache Cache2 I/O thread 100% CPU due to O(n) linear search in CacheIndexIterator::RemoveRecord with large cache
2014323 Layout: Columns 0-height frame is generated on testing/web-platform/tests/css/css-scroll-snap/multicol-001.html
2017527 Layout: Grid Drop mCanBreakAtStart from nsGridContainerFrame::Fragmentainer
2017970 Themes Convert toolbar design tokens to json
2019159 Address Bar Update view padding and row selection/hover border radius
2019260 Framework Make the SearchInput a shared Component
2021047 Settings UI Integrate Firefox Labs page into setting-pane config
2021951 AI for Development Some additions to firefox-desktop-frontend SKILL.md for CSS and localization
2024039 XML Update libexpat to version 2.8.0
2024285 Design System and Theming Update DropdownMenu custom component to match M3 design
2026118 UI Tests Intermittent UI test failure - < BookmarksTest.verifySearchForBookmarkedItemsTest>
2026932 Networking: HTTP Remove network.http.altsvc.oe and related code
2027187 Disability Access APIs Promisify treeupdate a11y mochitests.
2027188 Disability Access APIs Promisify docload a11y mochitests.
2027580 Framework Move DebuggerImage to shared components
2027582 Framework Move CloseButton to shared components
2027604 JavaScript Engine Missing `using` disposal with a `break` in a for-of loop
2028840 Storage: Quota Manager The variant `inc-origin-init` expiration is on 2026-05-01
2028899 CSS Parsing and Computation Perma /css/CSS2/generated-content/multiple-content-values-001.xht | single tracking bug
2030973 New Tab Page Update hideAllWidgets function to use new WIDGET_REGISTRY
2031074 JavaScript Engine JS::loader::LoadedScript::CollectReports is unused
2031075 JavaScript Engine Clear stencil in ScriptLoader::TryCacheRequest if low memory
2031077 JavaScript Engine Convert CachedStencil-LoadedScript into non-cached one when clearing SharedScriptCache
2031289 Sidebar Add ability to drag and drop bookmarks/tabs into and out of the updated bookmarks panel
2031349 Lint and Formatting Fix a ruff warning in js/src/gdb/mozilla/JSString.py
2031357 Lint and Formatting Fix a ruff warning in js/src/frontend/align_stack_comment.py
2031374 Lint and Formatting Fix a clippy warning in netwerk/base/idna_glue/src/lib.rs
2031632 Password Manager Remove JS-side origin validation and fixup logic from LoginManagerRustMirror
2031688 Inspector: Rules @container "select container" button is hard to click , tooltip is getting in the way
2031807 IP Protection Add "NEW" badge to location selection button in VPN panel
2032014 Add-ons Manager Refactor about:addons into smaller per-component ES modules
2032234 Address Bar Result explanation text appears next to switch-to-tab chiclet
2032275 JavaScript Engine: JIT arm64: Emit tbnz/tbz for sign-bit branch tests in branchTest32/branchTestPtr
2032515 Graphics: CanvasWebGL Remove support for "in process" WebGL path
2032520 Audio/Video: GMP Prefer Chrome component update service for Widevine download URL if version/hash matches
2032528 Search [Search Optimization] Wire CombinedOnlineSuggestionDataSource into Fenix to replace mocked data sources for search optimization cards
2032587 Bookmarks Add UI for importing bookmarks
2032588 Bookmarks Add feature-importer android-components module
2032991 Address Bar Don't perform search when adding a new engine from search engine switcher
2033146 IP Protection Implement country list for location picker subview
2033379 JavaScript Engine Remove JS::loader::EventScript
2033505 IP Protection Update strings for VPN section in about:settings
2033598 Audio/Video: Playback Support HDR Metadata on supported codecs
2033616 IP Protection Get countries list for IPProtectionPanel state
2033808 JavaScript: GC Assertion failure: WeakMapBase::checkMarkingForZone(zone) @ gc/Sweeping.cpp:1260
2033834 Android Studio and Gradle Integration `No such file or directory: '/Users/nalexander/.mozbuild/android-sdk-macosx/cmdline-tools/20.0/bin/sdkmanager'` when building Android
2033907 Networking HTTP/2 connection coalescing issues with PSK-resumed TLS connections after restart
2033930 Homepage Add settings UI for toggling the Homepage Sports Widget
2033969 UI Tests Fenix UI test robots race Compose composition when clicking toolbar/menu/URL-bar elements via uiautomator
2033970 UI Tests Harden several Fenix UI test robots against CI flakes
2033971 UI Tests Reduce Fenix download test flakiness by serving small test files from the local mock server
2033972 UI Tests Fix Pocket story load flakiness in Fenix HomeScreenTest and HomeScreenRobot
2034120 Geolocation Provider Rejecting to enable system permission does not stop the browser to show system permission on a second attempt
2034159 WebRTC: Networking We should probably let it slide when an ICE check has an XOR-MAPPED-ADDRESS that does not match the XOR-RELAYED-ADDRESS of the TURN allocation
2034223 Bookmarks wire ImporterResult to bookmarks
2034336 General Potential issues with edge-to-edge support applying too big paddings to screens
2034343 Networking [MSIX only] Thunderbird fails with timeout in netwerk/test/unit/test_retry_decrypt_error.js
2034371 SVG Add textPath side attribute to SVG DOM
2034521 Homepage Add Countdown PromoCard for the Homepage Sports Widget
2034578 Try Selected build platforms no longer filter test jobs in Try chooser
2034620 New Tab Page Fix critical UI issues with Lists and Timer Widgets
2034652 Homepage Add a card for following your team in the Homepage Sports Widget
2034653 Performance Revert 1979760 for metrics regression
2034654 DOM: Navigation Add a profiler marker for failures to put sites in the bfcache
2034664 Homepage Implement the entry flow of Homepage Sports Widget
2034689 General Restore bug 1970055 changelog entry
2034741 Graphics Unvalidated enum cast to CrossProcessPaintFlags
2034789 WebRTC Perma [tier2] TEST-UNEXPECTED-PASS | /webrtc/simulcast/screenshare.https.html | Basic simulcast setup with two spatial layers - expected FAIL
2034796 JavaScript: GC Fix a couple of minor problems with concurrent marking
2034798 Graphics Refactor blocklist macros to prevent allowlist statuses with non-allowlist features
2034833 JavaScript: Standard Library Directly return ClippedTime from ParseDate
2034868 Homepage Add a11y content description strings for the Homepage Sports Widget
2034874 Audio/Video: Playback Use-after-free in wmf-clearkey PRETTY_FUNC logging macro
2034877 Homepage Stop rendering MiddleSearchHomepage in HomeFragment
2034899 Audio/Video: Playback Crash in [@ mozilla::RemoteDecoderChild::Shutdown::<T>::operator()]
2034959 General Update android nightly application-services version bump to new version 9712ad6c50ce9eeb82674b74862694519ee42730 from 2026-04-25 05:02:44
2034967 Tooling Perma mozilla.components.support.ktx.kotlin.StringTest.should convert host to idn when calling shortURL | org.junit.ComparisonFailure: expected:<[??].blah.com> but was:<[xn--kpry57d].blah.com>
2034989 Layout Use UniquePtr to manage TextOverflow objects in nsBlockFrame::BuildDisplayList to save some stack space
2035003 Testing Infrastructure Failing toolkit/modules/tests/xpcshell/test_GMPInstallManager.js in Thunderbird CI after bug 2032520 | single tracking bug
2035061 Graphics: ImageLib Perma [tier 2] /jpegxl/patches-reftest.html | single tracking bug
1350457 DOM: Animation Add DOM ScrollTimeline interface and its readonly attributes
1628669 Top Sites Cannot remove amazon.com from top sites list
1710087 JavaScript: WebAssembly ARM64: Use the zero register for zero constants when possible
1749580 Form Autofill Review logic and details for credit card network detection
1902497 Site Reports englishtest.duolingo.com - The Firefox browser is not supported
1904952 Site Reports idp5.civis.bz.it - Firefox is unsupported browser
1909546 Widget: Cocoa With inline PDF off, I may get multiple download dialogs & if close too fast locks up interface
1929118 CSS Transitions and Animations [css-animations-2][css-transitions-2] Add animation object to animation/transition events.
1974025 WebAuthn intent:// can bypass fido:/ URI block
1979277 Settings Can't set to default after dismissing the 'set to default' prompt and 'don't ask me again' checkbox
1996562 Graphics Recent versions cause small graphical glitches with websites
1997570 Spelling checker Pasting 4MB of text on https://bit.cloud/ spends 66 seconds in ScanCollapsibleWhiteSpaceStartFrom and OnEndHandlingTopLevelEditSubActionInternal
1999369 Downloads Opening the download page does not dismiss the notification or app badge (user must manually dismiss notification)
2005885 Downloads Failed Download Not Getting Deleted From Download Menu
2014206 DOM: Workers windowIDs getter on shared worker crashes the content process
2016870 DOM: Animation Make animation.timeline return a valid ScrollTimeline, if it is one
2021463 Messaging System Implement dynamic images for toast notifications
2021526 Sidebar Perma browser/components/sidebar/tests/marionette/test_default_launcher_visible.py | AssertionError: False is not true : Sidebar button should be visible
2023550 Privacy: Anti-Tracking Reduce Page Protection: Only show infobar on user-initiated reloads
2026008 Search Add support to SERP telemetry for search engines that use POST requests
2026569 Console The automatic adding of a close bracket does not work for CM6
2027209 Security Increase error code visibility on net error pages
2027803 JavaScript Engine Enable Stencil navigation cache pref on nightly
2028423 Address Bar Split browser/components/urlbar/tests/browser/browser.toml into smaller manifests
2028550 UI Tests UI tests disabled after setting privateModeAndStoriesEntryPointEnabled to false
2028707 Search [Search Optimization] - Replace delay(ARTIFICIAL_DELAY) debounce with Flow-based debounce in online suggestion providers
2029550 Toolbar Remove the XML toolbar support from the browser screen
2029553 Toolbar Remove SearchDialogFragment
2030248 App Links Page stops loading when the new "app link" bottom sheet is dismissed by tapping outside
2030390 Privacy Update UI of the blocked trackers pill
2030447 Sharing Implement randomized exponential backoff when attempting to contact server
2030618 Top Sites Prototype: scrolling shortcuts carousel
2030650 Printing: Output Firefox is printing in color even when choosing printing in black and white
2030964 WebDriver BiDi log.entryAdded lacks error message in `text` in nightly
2031599 Agent Fix browsingContext.sys.mjs to assign to #contextCreatedHandled instead of contextCreatedHandled
2031662 WebRTC: Networking High frequency esr140 SUMMARY: ThreadSanitizer: data race /builds/worker/checkouts/gecko/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_memory.c:80:14 in r_malloc
2031820 DOM: Bindings (WebIDL) Assertion failure: mDefinition->mConstructionDepth == mDefinition->mPrefixStack.Length(), at /builds/worker/checkouts/gecko/dom/bindings/BindingUtils.cpp:3796
2032054 Onboarding Display notification card regardless of “Set as default browser” prompt response
2032502 Settings UI Remove empty space from vpn-settings-get-started.svg illustration and use new padded variant of moz-promo instead
2032640 Sync Add ineligible flow in avatar/hamburger menus
2032670 Design System and Theming Migrate to using the Material3 color tokens - Part 4
2032997 Security HTTP error code missing on new error page for contentEncodingError
2033027 Contextual AI [Shake to Summarize] "Summarizing..." bottom sheet is transparent and does not follow Figma design on Android <10
2033090 Toolbar Refactor `FenixBrowserToolbarView` out as an ancestor view to ComposableToolbar
2033104 Crash Reporting Crash pings are sent in mochitests/reftests when MOZ_DISABLE_NONLOCAL_CONNECTIONS is set
2033188 DOM: Device Interfaces nightly fails to compile with: ../../../firefox-151.0/dom/webserial/PosixSerialPlatformService.h:59:10: error: 'gboolean' does not name a type
2033460 Gecko Profiler Add an overview to ProfilerCPUFreq-win.cpp.
2033504 Relay Firefox Relay CFR - Mask Expansion (Fix)
2033567 Tabs Visual jank when opening the tab manager
2033673 Widget remove nsISound::Play
2033820 Search Fix missing WITHOUT ROWID SQLite performance optimization in SERPCategorization.sys.mjs
2033900 Networking: Cookies Extend sqlite_cookies_block_main_thread to cover the entire cookie DB init duration
2033931 Installer Perma mingw [tier 2] /builds/worker/checkouts/gecko/toolkit/mozapps/update/common/EnterprisePolicies.cpp:X:10: fatal error: 'Windows.h' file not found | single tracking bug
2034055 DOM: Core & HTML Make HTMLOptionsCollection use nsContentList.
2034094 DOM: Copy & Paste and Drag & Drop Drag and dropping from a Libreoffice Calc spreadsheet yields garbling data in Linux/X11
2034118 Shared Components Assert markup rendered for basic shapes in browser_outputparser.js
2034178 Untriaged Facebook does not open in Firefox 150.0 (HTTP/3 stalled by endpoint protection?)
2034273 General Perma [tier2] Bgcc /builds/worker/fetches/sysroot-x86_64-linux-gnu/usr/include/c++/10/bits/stl_algobase.h:426:30: error: 'void* __builtin_memcpy(void*, const void*, long unsigned int)' reading between 1 and 17179869180 bytes from a region o
2034295 Messaging System Frequent browser/components/aboutwelcome/tests/browser/browser_aboutwelcome_restore_backup.js | single tracking bug
2034329 Untriaged Accessing ancestorOrigins in extension breaks websites (Gmail) that reads ancestorOrigins
2034350 Address Bar Show both teams' icons in sports suggestions
2034395 Audio/Video: GMP Crash in [@ nsIEventTarget::Dispatch]
2034472 UI Tests Retry-logic in the TAE framework does not work correctly
2034531 Task Configuration run full set of mozilla-beta tasks every 3 hours
2034723 DOM: Core & HTML Perma [tier 2] TEST-UNEXPECTED-PASS | /html/semantics/scripting-1/the-script-element/module/modulepreload-referrerpolicy.html | Modulepreload with origin policy should send origin-only referrer - expected FAIL
2034752 Networking: HTTP on-premise azure devops no longer works with firefox 150
2034852 Graphics: Text Don't pass around unused DrawTarget parameter in text shaping code
2034912 New Tab Page Nova - UI updates to daily briefing 3-pack card
2034995 Design System and Theming Replace existing M3 IconButton usage with IconButton from compose-base
2035014 Design System and Theming Upstream the PagerIndicator component to compose-base
2035030 Homepage Restore content of sports_widget_match_full_time
2035057 Lint and Formatting mozlint ci: Rename tm & W for something more explicit
2035086 General Use moz-src for dom/quota
2035090 Homepage Update the country code used in the Homepage Sports Widget
2035093 PDF Viewer Update PDF.js to new version 53931c5d2fc975f3c254d4663695c830b412fbe1 from 2026-04-26 20:15:03
2035094 Homepage Persist the selected country in the Homepage Sports Widget
2035122 Widget: Cocoa Use native resize cursors on macOS 15 and newer
2035134 JavaScript: Standard Library Iterator.zip / Iterator.zipKeyed TypeError always says undefined
2035137 XML Perma [Tier 2] win ccov D:/task_177727943155584/build/src/parser/expat/expat/lib\xmlparse.c(139,12): fatal error: 'random_rand_s.h' file not found
2035145 Toolchains Perma [tier 2] Windows MinGW ld.lld: error: undefined symbol: FOLDERID_ProgramFilesX86
2035146 Tooling Update the NoSystemCurrentTimeMillisRule to catch reference expression
2035167 Graphics: ImageLib use unused test/reference files in testing/web-platform/meta/jpegxl/
2035174 Networking adjust netwerk/test/mochitests/test_accept_header.html for jxl
2035188 Raptor Reduce android sp3 task duplicates
2035214 Installer Installing/Uninstalling the full installer twice leaves both the desktop shortcut and the Desktop Launcher on the desktop
2035215 Reftest Remove obsolete Windows reftest tab leak-threshold overrides
2035220 Release Automation move balrog stage usage over to new mozcloud environment
1527334 Networking: Cache Navigating to a page that was prefetched with <link rel="prefetch"> re-downloads it
1676795 DOM: Animation Fix Element::Animate() and Animation::Constructor to use ScrollTimeline
1843475 DOM: Events Avoid event type stringification in SessionStoreChangeListener::HandleEvent
1898695 Networking Intermittent leakcheck | tab 4656 bytes leaked (ChildImpl, CondVar, HttpBackgroundChannelChild, HttpBackgroundChannelChild::ActorDestr, HttpBackgroundChannelChild::RecvOnTran, ...)
1930213 Sidebar "Escape" key should collapse the expanded on hover sidebar launcher even if hover is still active.
1930750 Enterprise Policies Should be an enterprise policy to prevent users from turning off addon updates
1968117 Settings UI Convert settings related to Languages page to config-based settings
1972081 Settings UI Convert use OS Language settings for dates, times, etc to config-based prefs
1972086 Settings UI Update Firefox language section to SRD 2025 design
1997583 CSS Parsing and Computation CSS attr(): Detect Use of URL Tainted Value
1998865 General Run `apilint` tests (JVM/Gradle) in CI
2006340 DOM: Performance APIs Implement Resource Timing Level 3 interim response timestamps
2009673 Experimentation and Telemetry Add comments capturing why the description and status fields are not required for the processExited telemetry in ApplicationExitInfoMetrics
2017773 Tabs [TabGroup Grid Item UI] Tab group menu close item
2017954 General glslopt's float16_t definition causes build conflict with C++23 float16_t (with Windows SDK 10.0.26100.0)
2018065 Design System and Theming Remove the `overline` text from the List item reusable component
2018753 Tabs [Tab Groups] Stand-up the UI for a confirmation dialog when closing the last tab in a tab group
2019338 Address Bar Add a mute address bar quick action
2020177 Address Bar When opening firefox, if you click on the address bar before the homepage loads and you don't type anything, the homepage URL is appended to it when it eventually loads. Whatever you type after will have the URL in front of it.
2020404 Privacy: Anti-Tracking Investigate Strict mode pref values for Bounce Tracking Protection and Local Network Access Blocking
2020866 Tabbed Browser: Tab Groups Add new key to tabgroup.group_interactions metric to measure the usage of copy all links function
2023817 New Tab Page about:newtab wallpaper is decoded in the parent process
2025637 Autofill Crash in [@ java.lang.RuntimeException: at android.view.autofill.AutofillManager.isAutofillSupported(AutofillManager.java)]
2026686 XPCOM nsAutoLowPriorityIO for Linux/Android
2026913 Networking: Cookies Remove nameless cookies (put them behind pref)
2026924 Address Bar Cannot change search engine by keyboard shortcut via ctrl/cmd-up/down
2027029 Machine Learning: Frontend Use markdown-it to render assistant chat messages
2029561 Graphics: WebRender www.vans.cl - Page fails to load and crashes the browser (Android)
2030479 Tabbed Browser: Split View Layout shifts when switching to split view tab
2031494 Firefox Monitor Add setting to disable breach messages
2031503 WebRTC Update to libwebrtc 148
2031881 XPCOM Consider adding nsIAsync{Input,Output}Stream implementations for OS pipes
2032328 JavaScript: GC FinalizationRegistries and WeakRefs are not updated after transplanting
2032433 Networking: Cookies Fenix applink: CookieService::GetCookiesForURI can block applink for ≈825ms with large user profile
2032973 Address Bar Typing something in the urlbar and clicking an engine in the unified search button popup records a urlbar abandonment event
2033191 General remove some ownerGlobal usage.
2033327 Site Identity Trust panel spacing became lopsided after bug 2019097
2033341 Graphics: WebRender 1758199-1.html crash with WebRender layer manager in macOS
2033481 Tabs [TabGroups Tab Page] Click logic on the tab groups
2033628 Audio/Video: Playback Support HDR metadata from `mdcv` `clli` boxes for mp4
2033670 Graphics: ImageLib Check for transparency in gif decoder before finished a frame count decode
2033671 Graphics: ImageLib Bring consistency to transparent image gtests
2033674 Graphics: ImageLib Add a long jxl animation gtest testcase and multi-chunk frame count decode test
2033675 Graphics: ImageLib add gtests that incremental and all at once decodes match (including progressive jxl)
2033688 Graphics: ImageLib jxl finite animated images should loop the correct number of times
2033846 Form Autofill Trigger the autocomplete popup on the first click for all form fields
2033882 IP Protection Update VPN panel loading state
2034227 Browser Engine [Shake to Summarize] add page summaries to settings search
2034245 Build Config Make source-package more product neutral
2034315 Graphics Use UpdateBot to manage Cairo revendoring
2034407 Design System and Theming Search Settings and Permissions icons are barely visible in Private Mode
2034426 Graphics Remove IsEnumCase
2034433 Address Bar Search bar dropdown displays a thick bottom border in HCM
2034439 Inspector: Rules Add stack entry text in OutputParser#stack
2034548 Remote Settings Increase remote-settings sync frequency in android
2034575 IP Protection Alphabetically sort country list in location picker
2034589 WebRTC: Audio/Video Use EventTargetCapability throughout CamerasParent
2034670 Audio/Video: Playback Update opus to new version c6f8d82fce7584d7a670908fbbb2c76bd9030ce6 from 2026-04-22 15:47:13
2034688 New Tab Page Nova customization panel - Add in wallpaper check to the new toggle logic
2034722 WebRTC: Audio/Video Regression between 149.0.2-1 and 150.0-1 cannot use v4l2loopback based webcam: USER_FORBIDDED_CAPTURE_VIDEO Error: Video loadedmetadata timeout 3 with canon EOS as webcam
2034762 Graphics: WebGPU Unvalidated enum cast to GPUDeviceLostReason
2034832 Source Code Analysis Make firefox headers compatible with current static analysis
2034839 Source Code Analysis Make xpcom/ headers compatible with current static analysis
2034842 Source Code Analysis Make widget/ headers compatible with current static analysis
2034843 General Remove "It's the best!" from try push notification email
2034847 Source Code Analysis Make browser/ headers compatible with current static analysis
2034849 Source Code Analysis Make uriloader/ headers compatible with current static analysis
2034883 Security: PSM Update NSS to new version b7c2432bde239b10c4c209588cc6861776c2f2a9 from 2026-04-24 16:33:47
2034898 Messaging System Expose pin state, AI control prefs and pinning to taskbar to UI Tour
2034966 DOM: UI Events & Focus Handling Crash in [@ mozilla::ipc::FatalError | mozilla::ipc::IProtocol::HandleFatalError | mozilla::AutoProfilerLabel::~AutoProfilerLabel]
2034974 Graphics: ImageLib jxl frame scan decoder should post it's results incrementally
2035009 Migration panel-list items in the migration wizard are vertically misaligned
2035021 DOM: Animation Rename ScrollerInfo::mTarget to mSourceOrTarget
2035068 Disability Access APIs Heap Corruption via IA2 `IAccessibleTable2::selectedColumns/selectedRows` path
2035159 Graphics: ImageLib don't store an extra copy of compressed jpeg xl source data in the decoder
2035171 Downloads Panel add jxl test to browser/components/downloads/test/unit/test_DownloadsViewableInternally.js
2035217 Onboarding The ToU onboarding card lacks top margin and the Kit image is oversized on small screens
2035223 Add-ons Manager Reorganize aboutaddons.html script tags by group and alphabetical order
2035245 Address Bar Add test coverage for urlbar.autofill_deletion not over-counting consecutive backspaces
2035295 General Use moz-src for dom/geolocation
2035318 General Consider adopting -gsimple-template-names
2035346 DOM: Bindings (WebIDL) Document.h should be included if an interface has LegacyLenientSetter attributes.
2035349 Toolchains macOS SDK is 403-ing again
2035354 PDF Viewer Update PDF.js to new version a1b7d0feb519452584efb39ad7501e3b06712a31 from 2026-04-27 20:14:42
2035355 Themes Duplicated panel shadows on macOS after bug 1988296
2035359 Graphics Adjust gfx error log for Bug 2035063
2035370 Widget: Cocoa macOS Tahoe renders inner shadow rim for panels, affecting border color
2035399 General Update android nightly application-services version bump to new version 3f3e38259d2f37441675ca258a7d6a1eb4de7e84 from 2026-04-28 05:02:12
2035456 Graphics: ImageLib Perma /jpegxl/imagedecoder-animation.https.html | Animated JXL with repetition count 0 plays exactly once. - assert_true: image/jxl should be supported expected true got false - when Gecko 152 merges to beta on 2026-05-18
2035504 DOM: Core & HTML Use MakeEnumeratedRange for UseCounter
1505389 DOM: Networking Navigation Cancels XHR Requests and Calls Onerror Callback
1682027 Raptor High frequency | results.MissingResultsError: Browsertime cycle missing ['paintTiming', 'first-contentful-paint'] measurement / Browsertime cycle missing ['largestContentfulPaint', 'renderTime'] measurement
1767716 Debugger Intermittent devtools/client/debugger/test/mochitest/browser_dbg-windowless-service-workers-reload.js | single tracking bug
1812075 UI Tests Intermittent UI test failure - < CrashReportingTest. useAppWhileTabIsCrashedTest >
1839953 geckodriver geckodriver doesn't detect when Firefox exits during startup on Android
1855143 Widget: Gtk Remove global constructors from widget/gtk/MPRISServiceHandler
1892964 Security Lockstore - Initial implementation
1898035 JavaScript: WebAssembly Hide stack frames from builtin modules when self hosted code is excluded
1929645 Address Bar Intermittent browser/components/urlbar/tests/browser/browser_searchSingleWordNotification.js | single tracking bug
1930674 Web Painting Consider removing will-change ActiveLayerTracker / budget code.
1932516 Address Bar Intermittent browser/components/urlbar/tests/browser/browser_contextualsearch.js | single tracking bug
1968120 Settings UI Convert settings related to More from Mozilla page to config-based settings
1971997 Networking: HTTP HTTP/2 and HTTP/3 should not reparse the headers.
2004803 JavaScript Engine Add initial implementation for Iterator.prototype.join
2013258 Security Messaging Layer Security - Remove dependency in forks of nss-rs and mls-rs
2016118 JavaScript: WebAssembly Enable JSPI internal types in primising/suspending args
2016157 mozperftest Modify validation stage of startup tests to have a retry once
2016569 CSS Parsing and Computation Parse the keyframe selectors for timeline range names
2017220 DOM: Core & HTML Blocking a top level navigation from iframe when we shouldn't
2017712 Networking: HTTP Firefox shows LNA prompts more eagerly than Chrome does, when there's a network hiccup that causes DNS to think public servers are at your local router address
2018400 CSS Parsing and Computation Cross-origin CSS rule disclosure and redirect URL leak via mOriginClean reset in StyleSheetInfo clone
2019370 WebRTC Disable setParameters compat mode in wpt
2019504 Layout: Scrolling and Overflow Implement in-tree order preference
2021258 Performance Engineering Use NDK AChoreographer for vsync on Android
2021345 DOM: Device Interfaces Move WebSerial reads to a separate thread for performance/power reasons
2025229 Security: Process Sandboxing Get rid of sandboxed GetComplexLineBreaks
2025264 Graphics: WebRender Port image borders from brushes to quads
2025884 Sync Introduce Send Tab toolbar button
2026456 Settings UI Mark all "Firefox Home" features disabled if it isn't selected in Homepage settings
2027885 New Tab Page Nova - UI Updates to List Widget Compact Layout
2028476 Widget: Win32 PDF Viewer File-Dialog crashes when a PDM (SolidWorks) folder is selected.
2029240 Profile Backup Local Firefox backup fails every time
2030035 DOM: Security https-only mode does not upgrade connections if an error code is sent back
2030179 PDF Viewer Enable merging PDFs in Release
2030338 General Integrate Breach Alerts application services component
2030988 Sidebar Intermittent browser/components/sidebar/tests/browser/browser_bookmarks_keyboard_navigation.js - test_arrow_down_from_last_row_to_next_folder - Test timed out | single tracking bug
2031308 Performance Engineering Collect country information for some eTLD+1 pageload events
2031370 Lint and Formatting Fix a clippy warning in storage/rust/src/lib.rs
2031372 Lint and Formatting Fix a clippy warning in toolkit/components/kvstore/src/task.rs
2031472 Sync Implement flows for signed-out and single-device users in context menus
2031668 DOM: HTML Parser Enable dom.lift_select_parser_restrictions.enabled in nightly
2032086 JavaScript: WebAssembly Add branch prediction to brOnNull and brOnCast
2032180 Privacy: Anti-Tracking Reduce Page Protection: Add "Don't show again" button
2032194 WebRTC: Signaling Correctly Allow Re-Use of Disabled M-Section Allowing Media Type Switching
2032313 Safe Browsing Enable SafeBrowsing V5 Real-Time simulation for Fenix.
2032544 Messaging System Add nimbus targeting attribute for first-run enrollment on mac, linux, msix
2032819 JavaScript Engine `for (using x of iterable)` Inside Generators — Disposal Skipped on Generator Close
2033061 Search [Google Lens] Add google lens entry to context menu for pictures
2033135 IP Protection Add moz-promo to ipprotection-locations wrapper
2033494 Bookmarks Create implementation of bookmark file parser based on Jsoup
2033551 Address Bar Update top-pick/carrots icon size and border radius for Nova
2033569 Tabs [Tab Groups] The group color picker is sometimes blocked by the keyboard
2033578 New Tab Page Add sports event widget strings
2033644 Networking IPv4 host parser accepts numbers larger than 2^32
2033652 DOM: Core & HTML Assertion failure: AllowsAutoSizes() (Should only be called if allows auto sizing), at dom/html/HTMLImageElement.cpp:698
2033867 Settings UI Drag indicator is not visible when dragging an item to the top of a reorderable lists
2033953 General Perma macos [tier 2] devtools/server/tests/browser/browser_canvasframe_helper_04.js | Uncaught exception in test - TypeError: target.addEventListener is not a function | single tracking bug
2034149 JavaScript: Internationalization API Prepare existing code for Intl.Locale Info
2034219 Search [Google Lens] Check permission flow for camera
2034338 Inspector: Rules Move handling of basic shape functions to OutputParser#onCloseParenthesis
2034339 Inspector: Rules polygon() function is missing content when there are spaces before the closing parenthesis
2034375 Graphics: WebRender Let low-quality-pinch-zoom ride the trains on Android
2034379 Homepage Implement the Countdown functionality for Homepage Sports Widget
2034516 XPConnect Add/RemoveGCCallback API is unused
2034522 JavaScript: WebAssembly Use release mode assertions for js::wasm::TypeDef getters
2034632 JavaScript Engine: JIT Fall back to monomorphic inlining if a trial-inlined ICScript hasn't been used
2034665 Bookmarks Add support to browser-sync-storage for inserting a tree of bookmarks
2034666 Bookmarks Refactor lib-bookmarks-file to leverage concept-bookmarks-parser and concept-storage-bookmarks
2034681 JavaScript Engine: JIT Assertion failure: res_.isNumber(), at js/src/jit/CacheIR.cpp:15738
2034725 UI Widgets Add storybook documentation for <panel-item badge-type="...">
2034962 Tabs Tab closed info toast overlaying last tab in tab list
2034975 General Perma mochitest-browser-chrome TEST-UNEXPECTED-FAIL | browser/base/content/test/framebusting/browser_framebusting_notification.js | uncaught exception - PreferenceNotAddedError: Setting "showUpdatePrompts" - when Gecko 152 merges to beta on 2026-05-18
2035163 JavaScript: GC GC pointer wrappers can unncessarily run barriers when added to a hash table
2035254 Tooling Add Tab Reloading debugging helper to the Debug Drawer
2035256 JavaScript: WebAssembly Update wasm spec tests (Apr 2026)
2035301 Tooling Eliminate ByteBuddy/Robolectric Function-type LinkageError flake in fenix unit tests
2035322 Address Bar Update sports suggestions l10n string for scheduled games
2035342 Bookmarks Integrate `concept-bookmarks-file` into `feature-importer`
2035420 DOM: Bindings (WebIDL) Frequent non-fatal build OSError: [Errno 9] Bad file descriptor
2035435 Tooling Add ADR template
2035443 CSS Parsing and Computation Remove unneeded lock for StaticPresData.
2035447 General [DevTools Release Tasks - Cycle 152] Remove backward compatibility code
2035452 WebRTC: Audio/Video Use CaptureEngine type for CamerasParent::GetDeviceInfo and EnsureInitialized.
2035453 Networking ssl_tokens_cache.bin not written on Nightly quit
2035472 General Consolidate GeckoMediaDrmBridge V21/V23 after min API 26 bump
2035556 JavaScript Engine Immediately stop the delazification collection without dispatch
2035571 DOM: Core & HTML Introduce the prefrence 'dom.image.auto_sizes.enabled' and disable sizes=auto temporarily
2035602 Graphics Annotate GPUProcessManager::MaybeCrashIfGpuProcessOnceStable as OOM crash if GPU process OOMed
2035612 Graphics: Text The macOS supplemental font thread may race profiler mutex destruction
2035619 New Tab Page Fix customization panel back arrow train-hop backward compatibility
2035630 Graphics Fix misleading reason for disabling remote canvas features during fallback
2035654 Toolchains Perma wrench-deps Toolchains [taskcluster:error] exit status 101 | failed to load lockfile for /builds/worker/workspace/build/src/gfx/wr
2035666 Graphics: ImageLib disable libwebp avx2 support temporarily
2035671 Tabbed Browser Remove support for the secondary tab label
2035694 Tooling Update Gradle to version 9.5.0
2035704 Graphics Use UpdateBot patch lists to manage Cairo vendoring
2035773 Marionette Client and Harness Release marionette-driver 3.7.0
2035779 Networking Add a helper for getting network.trr.mode
1341228 Audio/Video: Playback [mse][youtube] unable to pass test case 92(AppendMultipleInitOpusAudio)
1425483 Widget: Cocoa On Mac, with RTL languages, CMD+Left/Right goes in wrong direction
1611643 Picture-in-Picture Autoplayed next video should also be PIP
1830463 Enterprise Policies Import data from another browser is accessible inside about:logins page while DisableProfileImport enterprise policy is active
1943452 Audio/Video Intermittent Assertion failure: false (MOZ_ASSERT_UNREACHABLE: We expect xpcom to be live when calling this, so we should be able to add a blocker), at /builds/worker/checkouts/gecko/dom/media/gmp/GMPServiceChild.cpp:57
1955963 Crash Reporting Make accessing annotations to nsCString objects safe in the main process
1975822 Audio/Video mp3 files with invalid VBR header show incorrect length in audio player
2002665 Protections UI Update browser_continue_button_delay.js to work with trustPanel enabled
2011921 DOM: Navigation Crash in [@ mozilla::dom::BrowsingContextWebProgress::ContextReplaced]
2012698 Layout: Form Controls Introduce new slot for button first child in <select> ShadowDOM
2015855 Installer "Do you want to move the “” Installer to the Bin?"
2019144 General Vendor the rest of application-services
2019324 New Tab Page ./mach newtab get-unbranded-builds returns the wrong link for Linux builds
2019490 Layout: Scrolling and Overflow Implement prefer targeted element feature
2024589 Firefox Source Docs: Content adjust the code: searchfox.org/mozilla-central is now redirectiring to searchfox.org/firefox-main/
2024854 JavaScript Engine Add support for text modules
2025622 Sharing Render share preview in left side of modal
2026033 WebRTC Intermittent leakcheck large nsGlobalWindowInner | dom/media/webrtc/tests/mochitests/mochitest.toml
2026973 Tooling Investigate animated entry point on home page
2027819 Privacy: Anti-Tracking Use EffectiveStoragePrincipal for Quota operations and IndexedDB file references
2027823 Privacy: Anti-Tracking Pay attention to storage partitioning for sessionStorage cloning in window.open
2027830 Privacy: Anti-Tracking Remove implicit unpartitioned BroadcastChannel use in Worker and Storage Mochitests
2027835 Privacy: Anti-Tracking Remove reliance on storage unpartitioning in worker and storage xorigin mochitests
2028360 Profile Backup Add a new backup detection completed event
2028372 Profile Backup browser.backup.restored_profile_data should be in the metrics ping not the post-profile-restore ping
2028747 Profile Backup browser.backup.restored_profile_data should include more information about the provenance of the restore operation
2029220 Machine Learning: Frontend Reduce unwanted sidebar auto-open via adaptive behavior
2030782 Machine Learning: Frontend keyboard selecting smartbar suggestion fails to chat or performs original query's chat intent
2030891 Accounts and Sync Fenix needs to support an FxA flow to authorize additional scopes.
2031186 Graphics: ImageLib modernize and automate libjpegturbo update process
2031187 Graphics: ImageLib upgrade libjpegturbo to 3.1.4.1
2031237 WebDriver BiDi [wdspec] Update continue_request/cookies.py to match the specification
2031653 Crash Reporting Child crash reports can get mixed up between different test instances on Android
2031794 SVG Assertion failure: aActiveTime >= 0 (Expecting non-negative active time), at /builds/worker/checkouts/gecko/dom/smil/SMILTimedElement.cpp:1719
2032398 Networking Remove mirroring for unused necko probes
2032495 JavaScript: WebAssembly Clarify FrameIter invariants for stack switching
2032551 Tabs [Tab groups] Navigating from "add to group" to create or from the expanded to the edit flows causes the first destination to reanimate
2032641 Profile Backup Restored profiles should get a new profile creation date rather than inherit from the intermediate profile
2032998 Machine Learning: Frontend Memories Onboarding Card
2033043 New Tab Page Remove React 19 ontoggle/onToggle backward-compat shims
2033045 New Tab Page Remove renamed design token backward-compat SCSS fallbacks
2033049 New Tab Page Remove AboutPreferences backward-compat shims for home-pane-loaded and SettingGroupManager
2033051 Messaging System Remove PanelTestProvider test message shim from browser_asrouter_newtab_messages.js
2033454 Performance Engineering Move important parts of PerfStats into MozGlue
2033528 Machine Learning: Frontend Remove ai-chat-search-button from the codebase
2033549 Security: PSM remove legacy PSM telemetry
2033555 Audio/Video: Playback Update dav1d to new version c5726277ffa8764665ea08f865e46912a41f2309 from 2026-04-16 16:02:28
2033579 New Tab Page Create sports event widget scaffolding
2033621 IP Protection Pass country code to IPProtectionPanel from locations component when a location is selected
2033630 Try Poor error handling in `mach try` (scm level expired, unknown hg commit_id, ...)
2033843 Settings UI Broken privacy settings with snap package due to failure to load AppUpdater module
2033863 WebRTC: Signaling Clean up SDP parsing.
2033921 Tabs [Tab Groups] Integrate the tab group list item into the tab list view
2033950 Machine Learning: Frontend Build disambiguation panel shell and actions
2033985 MFBT Move USING_ENUM macro into MFBT as MOZ_USING_ENUM so it can be used in more code
2034036 General Use diskarzhan to lint standard headers
2034351 Audio/Video: Playback Intermittent leakcheck large nsGlobalWindowInner | dom/media/autoplay/test/browser/browser.toml
2034604 Task Configuration run macOS mochitests on AArch64
2034618 Tabs Inactive tabs metrics are not being reported
2034623 Messaging System Create asrouter-newtab-multistage component that allows for embedding multistage messages inline in newtab
2034697 Disability Access APIs Bounds incorrect after scrolling on some MDN pages
2034873 Audio/Video: Playback Share a single WMFPMPServer across WMFClearKey CDMs to avoid MF_E_SHUTDOWN from MFCreatePMPMediaSession
2034896 General Remove DEFAULT_MODEL from Fx codebase
2034897 Layout: Images, Video, and HTML Frames contain: size image ignores aspect ratio from width/height attributes
2035047 Audio/Video: Web Codecs tests in testing/web-platform/meta/media-source/mse-for-webcodecs/tentative are not run
2035049 Lint and Formatting add a new lint job to catch wpt tests that fall through the cracks
2035059 Audio/Video: Playback Certain MP3 files report their length as Infinite instead of actual length when playing with HTML5 Audio element
2035095 Graphics: WebRender Initial refactor of some webrender types so that prim instances are immutable
2035104 Homepage Align Homepage Sports Widget data types with the API schema
2035109 Homepage Update SportCardHeader to align with the latest designs
2035114 Homepage Implement the MatchCard component to be display in the Homepage Sports Widget
2035255 Machine Learning: Frontend Memory generation should wait for firstrun onboarding completion
2035261 Mochitest Improve uncaught exception and rejection reporting in mochitests
2035323 Address Bar trust panel site security information: put certificate issuer in bold on its own line
2035415 JavaScript: WebAssembly table.copy: wrong aliasing check for imported tables
2035417 Lint and Formatting mozling: make the android lint faster
2035536 New Tab Page Make enabling HNT Nova at runtime less janky
2035591 CSS Parsing and Computation Make sServoFFILock a mutex.
2035620 Audio/Video: Playback [wmfme] More error handling for PlayReady
2035628 DOM: Core & HTML Remove sessionstore ownerglobal usage.
2035629 General mozlint clippy: warnings past the first crate that triggers -Dwarnings are silently dropped
2035632 Lint and Formatting fix the not_unsafe_ptr_arg_deref errors
2035639 WebRTC: Audio/Video Issues with mute/unmute when rejoining a call
2035643 Experimentation and Telemetry move integrity guard to TELEMETRY flag
2035647 Settings UI Settings empty when built without updater
2035648 Security Fix alphabetical ordering in browser.toml
2035727 General Update android nightly application-services version bump to new version ab07ff26f5b6e8dbb3d0fc9e99e62334ce50e4b7 from 2026-04-29 05:01:48
2035768 IPC Use SandboxingKind parameter type for UtilityProcessChild::Init
2035778 XPCOM Perma mingw [tier 2] /builds/worker/checkouts/gecko/xpcom/tests/gtest/TestAsyncPlatformPipes.cpp:X:14: error: no member named 'GetCurrentProcessId' in the global namespace | single tracking bug
2035801 Security: PSM Disable the pref security.ssl3.ecdhe_ecdsa_aes_128_sha for release
2035898 WebRTC Google Meet broken on nightly
2035910 PDF Viewer Update PDF.js to new version 34c3ee16f8fa07f14d425be87d421afb63dccacf from 2026-04-29 15:04:14
2035932 Toolchains Update the VS 2026 toolchain to 18.5.2
2035941 SVG Remove dos newlines from layout/reftests/svg/sizing
1677741 Task Configuration action tasks like backfills. retriggers and reruns tasks should have priority 'very low', else they can prevent tasks for recent pushes from running
1730122 Bookmarks & History Right-clicking on a bookmark item brings up the wrong context menu.
1775711 Keyboard Navigation Intermittent browser/base/content/test/keyboard/browser_popup_keyNav.js | single tracking bug
1868738 Widget: Cocoa On macOS with multiple monitors, the about window always opens on the main monitor
1885264 Address Bar Intermittent browser/components/urlbar/tests/quicksuggest/browser/browser_weather.js | single tracking bug
1897279 CSS Parsing and Computation New wpt failures in /css/css-anchor-position/last-successful-intermediate-ignored.html
1952955 Address Bar Address bar displays 127.0.0.1 when following links to 0.0.0.0 ("fixes" URI when it shouldn't)
1960887 JavaScript: WebAssembly Intermittent /builds/worker/checkouts/gecko/js/src/jit-test/tests/wasm/js-promise-integration/debug.js:90:9 Error: Assertion failed: got true, expected false
1978895 Networking [ms3] Ensure WebrtcTCPSocket work with HTTP/3 proxy
1983032 File Handling DisableBuiltInPDFViewer set to false causes handler.json preferences for PDF handling to be overridden at startup
1983159 JavaScript Engine Store Host Defined Data in Promise Datastructure Slots, rather than as a single slot
1990885 Settings UI Convert settings related to About Firefox page to config-based prefs
1994121 Graphics: WebRender YouTube video does not use video overlay when selecting video list with the cursor
2002760 Tooling UseCases should be safe to call from the main thread
2004889 Networking: HTTP Transaction with NS_HTTP_DISALLOW_HTTP3 flag can't fallback properly
2006292 Networking: HTTP Avoid creating wildcard connection entries more than once
2020947 Crash Reporting Intermittent thread '<unnamed>' panicked at toolkit/crashreporter/crash_helper_common/src/ipc_connector/mach.rs:376:31:
2020960 Application Update Updates in background on macOS steal focus
2022414 Profile Backup Switch to using an array instead of an object string for browser.backup.enabled_on.profiles
2024050 Top Sites Automate periodic update of top sites metadata and favicons
2026228 General Opening devtools on the Console tab causes so much overhead on network transfers that I can't profile what my page is doing
2026258 Widget: Gtk [Wayland] Right Click and Menu Popups not Rendering
2027833 Privacy: Anti-Tracking Remove implicit unpartitioned BroadcastChannel use in remaining Mochitests
2028299 Sidebar Change on click behavior in the Tabs from other devices sidebar panel
2028933 geckodriver Create universal builds for GeckoDriver
2030143 Privacy [IPProtection] Import 'feature-ipprotection' into fenix
2030162 UI Widgets Add Code Connect for Nova Components to UI Widgets
2030728 Toolbar Crash in [@ java.lang.StringIndexOutOfBoundsException: at java.lang.String.charAt(Native Method)]
2030761 Tabbed Browser Intermittent TV browser/components/tabbrowser/test/browser/tabs/browser_tab_splitview.js | A promise chain failed to handle a rejection: File closed - stack: getPipe@resource://gre/modules/subprocess/subprocess_unix.worker.js
2030805 Machine Learning: General Point automated tests to real remote settings dump
2030917 Tooling Use assertIs<Type>() instead of assertTrue(x is Type) in tests
2031009 Telemetry JOG does not seem to work in artifact builds of fenix
2031837 Security Update illustrations on Felt Privacy error pages to latest designs
2032027 General Linter warning: "Rand is unsound with a custom logger using rand::rng()"
2032602 Tabbed Browser Update Share submenu in the tab context menu on Windows
2033243 DOM: Core & HTML Rename ownerGlobal to relevantGlobal
2033772 Experimentation and Telemetry [Android Pref] Targeted pref value is not reset in the same session if client unenrolls from 2 deliveries sequentially
2033842 Widget: Gtk Firefox window invisible on Wayland (GNOME) on first launch when no startup activation token is present
2034063 Graphics: CanvasWebGL Couldn't sanitize Direct3D ANGLE renderer "Qualcomm(R) Adreno(TM) X1-85 GPU"
2034079 JavaScript Engine: JIT Handle input != output in x86-shared MacroAssembler::abs methods when AVX is disabled
2034237 Machine Learning: Frontend Smartbar suggestions selection highlight does not have a border radius
2034525 IP Protection Implement an IP Protection Auth Provider to support GPI as an alternative auth flow for mobile
2034846 Source Code Analysis Make dom/ headers compatible with current static analysis
2034983 Graphics: Color Management give qcms a f16 transform interface
2034984 Graphics: ImageLib change how jxl decoder does color management
2035173 JavaScript Engine: JIT Intermittent testBufferAllocPolicy_vector | .\../../../../src/js/src/jsapi-tests/testGCAllocator.cpp:X:CHECK failed: zone->bufferAllocator.isPointerWithinBuffer(oldVector) | .\../../../../src/js/src/jsapi-tests/testGCAllocator.cpp:X:CHECK failed:
2035205 Netmonitor devtools/client/netmonitor/test/browser_net_frame.js permafails on mac
2035252 Search Remove commented-out code in SearchService.sys.mjs
2035353 Address Bar Rich search suggestion icons are forced into a square aspect ratio
2035407 Privacy Create the composable for IP protection onboarding card
2035429 Tooling Introduce kotlin-test and encourage using it
2035479 Messaging System Barely legible text (very low contrast) for "Firefox Relay" callout dialog (RELAY_SURVEY_SCREEN)
2035525 Application Update [macOS] Firefox remains in update state and cannot be launched afterwards on a standard macOS profile
2035527 Experimentation and Telemetry Update unenrollForGeckoPref usages in tests
2035540 Tabs [Tab groups] Reduce left padding of Groups list in Group selection bottom sheet
2035618 Experimentation and Telemetry Add ability to trigger message notification worker from ADB
2035663 Menus Context menu is unable to detect custom video players like instagram reels
2035665 DOM: Core & HTML user-agent shadow root returned from element.openOrClosedShadowRoot unexpectedly
2035695 DOM: Core & HTML High frequency /html/semantics/embedded-content/the-img-element/sizes/sizes-auto-resize-observer-removes-auto.html | ResizeObserver causes image to no longer allow lazy loading - promise_test: Unhandled rejection with value | single tracking bug
2035740 Bookmarks Extract AddFolderScreen, EditFolderScreen & SelectFolderScreen from BookmarksScreen
2035757 JavaScript Engine Move util/BitArray.h into ds/BitArray.h
2035767 Homepage Implement telemetry for Phase 1 - Showing the countdown card
2035774 Bookmarks & History Remove dead code trying to show the bookmarks toolbar for new profiles with imported bookmarks
2035777 UI Tests Replace DFS with BFS in NavigationRegistry.findPath to avoid incorrect navigation paths
2035841 DOM: Core & HTML Perma wpt [tier2] /TEST-UNEXPECTED-OK | /mediacapture-streams/MediaDevices-enumerateDevices-returned-objects.https.html | expected TIMEOUT | single tracking bug
2035864 DOM: Core & HTML Re-enable auto sizing in nightly, which was temporarily disabled in bug 2035571, while it remained enabled in beta/release
2035873 Cycle Collector Make more CC (and GC) probes collect process specific data
2035945 Sync Update "Send to device/Send to mobile" element on avatar menu when signed out
2035960 Tooling Update DAGP to version 3.10.0
2035965 JavaScript Engine: JIT ScanDominatorsForDefs(MBasicBlock*) uses parameter block instead of loop variable i, reducing scan to a single-block check
2035994 General Update android nightly application-services version bump to new version 8e94df1c5e845f6e6b4db4114ee76ce778be80b8 from 2026-04-30 05:02:54
2036004 New Tab Page Sports widget - add "runner-up" string
2036013 Networking: JAR Remove search-extensions/google/favicon.ico exclusion from RecordZeroLengthEvent
2036031 Graphics: ImageLib No rule to make target media/libjpeg/jcapimin.c', needed by `jcapimin.o'
2036040 XPCOM Use unsafe blocks in xpcom_methods when performing unsafe operations
2036041 DOM: Core & HTML Perma TEST-UNEXPECTED-FAIL | dom/html/test/forms/test_option_index_attribute.html | test - got 1, expected +0 - when Gecko 152 merges to beta on 2026-05-18
2036058 UI Tests Create new high priority tab search related UI test
2036070 Gecko Profiler profiler_backtrace_into_buffer reads out-of-bounds due to off-by-one
2036076 Bootstrap Configuration Mach bootstrap FileNotFoundError: [WinError 2] The system cannot find the file specified
2036086 UI Tests Re-enable verifyCopyUrlBarTextSelectionOptionTest UI test
2036089 Graphics: WebRender Compile error in wrshell
2036096 General Enable AI controls by default in all build types
2036134 Privacy Move getApplicationInstalledTime out of ToU into a utils directory
2036138 Privacy Add onboarding card variables to nimbus
2036148 Machine Learning: Frontend Don't show sidebar auto-open pref prompt if auto-open by default set to false
2036152 New Tab Page Only provide aria-label for Nova sections follow button when topic is available
2036158 Telemetry about:glean: Set up Histograms for Labeled Distribution metrics
2036171 Raptor Perfdocs broken on autoland
2036172 New Tab Page Fix Nova color tokens not being inherited by reusable components in New Tab
2036175 DOM: UI Events & Focus Handling Focus ring disappears when focused element is moved with moveBefore
643096 Widget: Cocoa macOS: dragging an image to Finder will fail if the image was loaded by query
1138419 DOM: Selection GTK: Shift-Ctrl-Arrow moves in the wrong direction in an RTL textarea
1676835 Graphics: WebRender Mark PWebRenderBridge as a refcounted actor in IPDL
1697691 JavaScript Engine: JIT Support SetElem in scalar replacement of arrays
1774060 CSS Transitions and Animations Update animations if the referenced scroll-timeline property gets changed
1922873 Web Speech Intermittent leakcheck | default 1744 bytes leaked (CondVar, Mutex, RenderThread, RenderThread::NotifyIdle, StringBuffer, ...)
1968113 Settings UI Convert settings related to Appearance page to config-based settings
1968118 Settings UI Convert settings related to Permissions & Data page to config-based settings
1979252 Try Default mach try to new lando
1990983 Messaging System [TOS] Enable new user TOU modal for Mozilla Official Linux distros
2002666 Protections UI Update browser_ext_themes_arrowpanels.js to work with trustPanel enabled
2002670 Protections UI Update browser_contextmenu_sendtab.js to work with trustPanel enabled
2017979 Themes Convert panel design tokens to json
2017993 DOM: UI Events & Focus Handling Frequent dom/events/test/test_coalesce_touchmove.html | Shouldn't have coalesced the initial touchmove - Structures begin differing at: | single tracking bug
2019975 New Tab Page Blocked topics intermittenly do not display in customize menu
2021084 Widget: Cocoa Silent regressions in accessibility testing after Bug 1710459
2026007 Translations Show language-agnostic SelectTranslations context menu item when the source and target languages are the same
2026320 Firefox Monitor Implement shield animation with SVG/CSS animations
2027463 Raptor Fix Incorrect Median Calculation Over Replicates in `parseWebCodecsOutput`
2027465 Raptor Refactor WebCodecs encoder benchmarks and add I420 pixel format support
2027745 Privacy: Anti-Tracking Remove the storage access unpartitioning of non-cookie Storage
2028273 Raptor Add camera raptor test
2028673 Machine Learning: Frontend [a11y] Empty Tab stops within a chat panel
2028676 Machine Learning: Frontend [a11y] Answer to user's question not obvious to screen reader users
2029189 UI Widgets Convert moz-page-nav variables into JSON design tokens
2030005 Machine Learning: Frontend Conversation starters no longer work / 429 excessive uncached or duplicate requests
2030072 Sidebar Add "Open in New Tab" and "Open in New Container Tab" options to the context menu for Tabs from Other Devices
2030079 Tooling Intermittent [gradle:error]: > Execution failed for task ':app:longfox:testDebugUnitTest'.
2031015 Translations Suggest the default target language for translation after changing the detected source language
2031195 CSS Parsing and Computation https://gemini.google.com icon not render when enable `layout.css.attr.enabled`
2031353 Lint and Formatting Fix ruff warnings in js/src/irregexp/import-irregexp.py
2031355 Lint and Formatting Fix ruff warnings in python/lldbutils/lldbutils/utils.py
2031501 Settings "Clear all" link is hard to read (dark purple on dark gray) in search-settings UI
2031825 IP Protection Add subheading under location selection button in VPN panel
2031929 Graphics: WebRender Enable layer compositor on macOS in Nightly
2032139 Machine Learning: On Device Create a custom PageExtractor strategy for search engine results
2032157 Machine Learning: Frontend Increase line height in chat messages
2032568 Machine Learning: Frontend Panel list items in smart window have invisible text when hovering an item in High Contrast Mode
2033272 Gecko Profiler Support def_cfa_register opcode appearing as the first CFA rule
2033273 Gecko Profiler Stylistic adjustments and cleanup of {Base}Profiler platform-dependent code
2033625 New Tab Page Update Widget Header/Menu code to use correct sizing option text
2034180 Shell Integration Add os.environment.launch_on_login_state Glean metric to record launch-on-login state at startup
2034181 Shell Integration Add launch_on_login.user_toggle Glean event when user toggles the launch-on-login checkbox in about:preferences
2034201 Themes Pull Figma Nova variables from the API rather than a manual plugin export
2034577 IP Protection Ensure correct keyboard navigation order for location picker subview
2034635 General Firefox hangs when embeddingEngine cannot be downloaded
2034699 DOM: Selection Testcase creating N empty SMIL nodes spends 23seconds in GetChildAt_Deprecated->SelectionMovementUtils::GetFrameForNodeOffset
2034891 UI Tests Simplify ui-test-apk kind via keyed defaults and command templating
2034933 Perfherder Add an alertSeverity field to performance artifact schema
2035010 Lint and Formatting mozlint: parallelize clang-format linter to balance CI workload
2035258 Messaging System Land strings for global rollout for Persistent infobar calling out disruption from Win10
2035305 JavaScript Engine BigInt benchmarks in JS3 pay a large penalty for digit lengths being stored in the cell header
2035681 Layout: Form Controls The caret is displayed on the left edge, regardless of the `text-align` value when the placeholder is visible
2035691 New Tab Page Sports widget - add countdown state
2035720 Homepage Add the MatchCardState to SportsWidgetState to handle displaying a MatchCard
2035793 JavaScript: WebAssembly Assertion failure: bound(), at jit/shared/Assembler-shared.h:445 with Wasm stack switching
2035805 New Tab Page Update Timer widget for Nova (Large & Medium)
2035836 WebRTC: Networking Unable to establish video conference audio connection
2035906 Address Bar Action results record selected_result as "action" instead of "action_<key>" in engagement telemetry
2035944 IP Protection Add metrics for IPP location picker
2035970 Widget: Cocoa Use a distinct bundle ID for unofficial builds on macOS
2035998 JavaScript: WebAssembly WebAssembly.Module.imports() hides polyfill imports and reflects wrong types when js-string builtins are enabled
2036015 XPCOM [loong64] Incorrect CFI directive for $ra storage location in SharedStub
2036023 Onboarding Enable Nimbus controlled experimentation with different marketing card layouts
2036116 JavaScript: GC Atom marking check in CheckWeakMapEntryMarking doesn't get run
2036139 DOM: Core & HTML Assertion failure: !aIID.Equals((nsISupports::kIID)), at checkouts/gecko/dom/base/FragmentOrElement.cpp:398
2036149 New Tab Page Newtab nova list widget non nova styles are showing a slightly broken nova style
2036150 Web Painting Assertion failure: IsEmpty() (Nonempty list left over?), at /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.h:3146
2036156 Layout: Scrolling and Overflow Assertion failure: rightOverflow >= 0, at layout/generic/ScrollContainerFrame.cpp:7052
2036160 DOM: Security Enable Crash Reporting API in Nightly.
2036202 Layout: Scrolling and Overflow Fix intermittent failures of /css/css-scroll-snap/snap-after-relayout/layout-follows-focused-targeted-block.html on Mac 14.7
2036203 Tooling Hide entry point behind longfox secret settings flag
2036207 Widget Change CreateFallbackRenderer and CreateBackgroundedFallbackRenderer to return already_AddRefed instead of raw pointers
2036216 Widget: Cocoa Fix formatting issues in /widget/cocoa
2036224 PDF Viewer Update PDF.js to new version 7ebf3a4d7c052bcc7ebadc9f8d07f460e843ec18 from 2026-04-30 17:34:02
2036225 Audio/Video: GMP Update chromium-cdm to new version 8f62f3ba6f06483f3908f9cce4f8d931800c9d7c from 2026-05-07 00:00:00
2036248 Geolocation Provider Fix non-unified build errors in nsMacPermissionMonitor.mm
2036298 DOM: Selection Selecting text doesn't work when toggling popover or switching display part.2
2036312 JavaScript Engine: JIT Assertion failure: allocationReadable(alloc), at jit/JitFrames.cpp:1956
2036345 CI Configuration Enable wmfme mochitests across more configurations
2036348 New Tab Page Update locales for another Firefox 150 train-hop
2036352 New Tab Page Newtab nova the css switcher removal change broken tokens build
2036359 New Tab Page Enabling Nova in the train-hop at runtime suppresses custom wallpapers
2036367 Widget: Cocoa clean up nsFilePicker.mm
2036392 Nimbus Desktop Client nimbus-telemetry feature disables enrollment status telemetry when enrolled
2036396 Security: PSM Generate the Root CA Usage sql query in regen_root_ca_metadata.py
2036401 New Tab Page Newtab nova widgets should align with content and use the same breakpoints
2036409 Lint and Formatting Update to ruff 0.15.12
2036416 New Tab Page Create new Nova widgets feature highlight
2036421 New Tab Page Lists widget uses the incorrect background color in Light mode
2036430 PDF Viewer Update PDF.js to new version 091b172a2283bcb7f7b3a1128c7b8c278832e680 from 2026-05-01 11:26:22
2036446 New Tab Page Lists widget celebration does not have any border radius
2036517 Layout: Form Controls <input type="number"> spin buttons ignore padding
2036528 Theme Provide dark mode colors for Page Info on Windows
411384 Bookmarks & History [Mac] Dragging Local files to Bookmarks Toolbar does not work
1610528 DOM: Core & HTML Kill `about:logo`
1650944 Layout Remove ReflowInput.h include from nsIFrame.h
1693576 JavaScript: Internationalization API Implement Intl.LocaleInfo
1701109 Widget: Cocoa store widget constraints as desktop pixels to better deal with multi-screen scaling factor issues
1937269 Symbols Consider scraping symbols for NixOS
1948488 Downloads Files that ends with % gets their dot before suffix mangled (test%.txt -> test?_txt)
1972787 Downloads Panel Warn file still listed in downloads view after removal from Library/about:downloads
2000360 Audio/Video: Playback Remove media.ffmpeg.customized-buffer-allocation pref
2001154 Settings UI Show newly redesigned File and Applications settings on new Downloads page when redesign is enabled
2008062 View Source When `view-source` fails to access a page, it renders empty context menu sections (many, when re-spawned, in a new tab).
2015877 JavaScript: WebAssembly Enable WebAssembly JS-PI in Nightly
2016509 Frontend Disable CSS filter applied implicitly to pageAction SVG icons on all channels
2016956 JavaScript: WebAssembly Assertion failure: needsToRecordInstruction(), at jit/PerfSpewer.cpp:648
2019823 Tabs [Drag and Drop] Drag Tab into Another Tab (Create/Group Flow)
2020061 Firefox Source Docs: Content JS Debugger section isn't included in index
2022981 Lint and Formatting Update toolbar.css so it passes use-design-tokens
2025303 General marannon: replace cert injection script usage with native code
2025322 Graphics: Color Management [HDR/Windows] Enable HDR video on Windows in release
2025626 Sharing Share modal buttons and click handlers
2025854 Performance profiler-symbol-server is archived. Instruct samply to do performance testing
2026028 Form Autofill Intermittent TV browser/extensions/formautofill/test/browser/browser_email_dropdown.js | single tracking bug
2026460 Task Configuration ASAN/TSAN crashreporter-symbols.full.zst is missing
2027091 Disability Access APIs Deprecate EventQueue mochitests
2028081 Graphics: CanvasWebGL startup [Ubuntu 22.04.5 LTS Nvidia] Crash in [@ _dlerror_run]
2028758 DOM: Navigation 9.23 - 4.57% cnn LastVisualChange + 1 more (Linux, OSX) regression on Wed March 25 2026
2029235 Layout Refactor native menu code in layout
2030165 Graphics: Color Management [HDR/Windows] Allowlist HDR video on AMD/NVIDIA drivers as they support HLG transfer function
2030717 Settings UI Pressing Space on checkboxes in Passwords section toggles the option and scrolls the page
2030904 Mochitest Remove memory-pressure notification from browser-test shutdown leak check
2031351 Lint and Formatting Fix a ruff warning in build/pgo/genpgocert.py
2031956 CSS Parsing and Computation range style query condition's query property gets extra parenthesis
2032483 Gecko Profiler Create a claude skill that helps with analyzing performance profiles via profiler-cli
2032816 General Port onDOMContentLoaded module initialization to use category-manager invocation
2033397 DOM: Core & HTML Keyboard lock state isn't updated correctly, while top-level document goes into fullscreen (without keyboard lock) first then requesting fullscreen (with keyboard lock) on OOP iframe
2033547 web-platform-tests Intermittent /infrastructure/reftest/testdriver-iframe.sub.html | single tracking bug
2033622 Tabs [TabGroups] Refactor reorder/move tab logic to the TabsTrayStore
2033776 Settings UI P&S Section: Update Nightly button is too close to the preceding text
2033780 Firefox Monitor Don't show breach alerts for Monitor or Credential Management users.
2033865 Disability Access APIs HTML `readonly` attribute should apply to all <input> types
2033905 General Redirecting search result pages to a page packaged in a WebExtension breaks searching from highlighted text's context menu
2034012 CSS Parsing and Computation css zoom does not zoom text in buttons
2034107 Telemetry Re-word info block/button in about glean to make more logical sense
2034202 Machine Learning: Frontend Regressed: Search mode switcher radius mismatched with smart window urlbar circle radius
2034246 Audio/Video: MediaStreamGraph Intermittent /mediacapture-streams/BrowserCaptureMediaStreamTrack-restrictTo.https.html | single tracking bug
2034495 Themes Audit/rename toolbar tokens
2034517 Inspector: Rules Move handling of url() to OutputParser#onCloseParenthesis
2034823 JavaScript: Internationalization API Update to tzdata2026b
2034841 New Tab Page Create pre-commit git hook for newtab developers
2035112 Layout When the page zoom level is not 100%, the position of the drop-down list shifts
2035143 Inspector: Rules Move handling of var() to OutputParser#onCloseParenthesis
2035311 Networking Add a stack to nsHttpChannel::Suspend marker.
2035460 JavaScript Engine: JIT Scalar replacement of MLoadArgumentsObjectArg/MLoadArgumentsObjectArgHole needs to check for forwarded formals
2035567 JavaScript Engine Private accessor setter on proxy receiver leaks proxy expando as `this`
2035741 JavaScript Engine: JIT Emit tbnz/tbz for more branch instructions
2035813 Inspector REDUX_MIDDLEWARE_IGNORED_REDUX_ACTION error message when closing toolbox with an Inspector extension
2035850 WebRTC: Networking Perma backlog /webrtc-encoded-transform/tentative/RTCEncodedAudioFrame-constructor.html | expected TIMEOUT | single tracking bug
2035885 Tabs Migrate TabManagementFragment from a DialogFragment to a Fragment
2035978 DOM: Workers Perma Assertion failure: !data->mDebuggerScope, at checkouts/gecko/dom/workers/WorkerPrivate.cpp:X
2036011 Bookmarks Implement cancellation functionality for the import bookmarks dialog
2036022 UI Widgets panel-list with max-width becomes scrollable when overflowing
2036042 JavaScript Engine Crash in [@ mozilla::Maybe<T>::operator-> | JS::loader::LoadedScript::IsUTF16Text]
2036062 Performance Don't run perfdocs on non-nightly code-review runs
2036083 General Refactor BrowserMenuController to use a data class for menu action callbacks
2036121 Tabbed Browser Reloading multiple highlighted tabs with Reload toolbar button or reload shortcuts.
2036157 General don't build all locales when running nightly build tasks on try
2036190 JavaScript Engine ModuleScript is not converted into GC-free LoadedScript before caching
2036233 New Tab Page Sports widget - add starter state without countdown
2036239 Layout: Generated Content, Lists, and Counters Remove ReflowAbsoluteFrames() in nsFirstLineFrame::Reflow()
2036250 Printing: Output Fix race condition leading to two mozPrintCallbacks being issued
2036365 Graphics: WebRender Slow composites when using DComp. Time spent in NtFlipObjectAddPoolBuffer and ZwFlipObjectRemoveContent
2036399 Lint and Formatting Rewrite dot-mozilla-reference linter to use mozcheck (Rust)
2036400 Lint and Formatting coverity: fixes the "uninitialized scalar fields" issues
2036402 Lint and Formatting coverity: Apply std::move where values can be moved instead of copied
2036424 Telemetry Perma diffoscope [tier 2] firefox/greprefs.js differs. See the diff.html or diff.txt artifact | single tracking bug
2036439 New Tab Page Perma trainhop [tier 2] browser/extensions/newtab/test/browser/browser_activation_window.js | test_activation_window_entry - Uncaught exception in test - TypeError: can't access property "documentGlobal", tabbrowser is undefined | single tracking bug
2036479 IP Protection Remove borders from location buttons to match HCM spec
2036494 Audio/Video: Playback Update opus to new version f8f99516092f4311a9b0784f190ff982df8eb2e6 from 2026-05-01 15:18:03
2036511 Graphics Use IPDL refcounted actors for VR
2036539 General Update android nightly application-services version bump to new version c03496e69a30f723eeeee667878ebb8999c00d61 from 2026-05-02 05:02:28
2036580 Layout Move BreakType definition out of ReflowInput class
2036597 Graphics: CanvasWebGL WebGl doesn't work in headless mode on macOS since Firefox 150
2036599 Layout Add layout debugger flags to dump information after page load
2036617 Source Documentation Perma sphinx.errors.ExtensionError: Handler <function analyze at 0x7f90caec9300> for event 'builder-inited' threw an exception (exception: Your code contains multiple documented objects at each of these paths:
2036620 Layout Enable field-sizing by default
2036625 Layout Perma [tier 2] /scroll-animations/css/view-timeline-range-animation.html | single tracking bug
2036645 PDF Viewer Update PDF.js to new version a55cec4a0fbb79563b64456fd2cc7dfa4143f855 from 2026-05-03 17:31:04
2036648 Theme Cleanup toolbox background-image set-up.
2036657 DOM: Core & HTML Assertion failure: IsIdle(oldState), at checkouts/gecko/xpcom/ds/PLDHashTable.h:141
2036661 Graphics Use IPDL refcounted actors for PTexture
2036824 Networking Remove reference to non-existent Networking: WebTransport Bugzilla component
2036866 General system_wrappers: capitalized legacy headers override POSIX wrappers on case-insensitive filesystems
2036885 New Tab Page Manually bump the minor version number of New tab from 152.0.0 to 152.1.0
1490339 General HomePage.jsm tries to open about:home (or user-set homepage) as a .properties file
1519636 Lint and Formatting Reformat recent changes to the Google coding style
1595158 Add-ons Manager [about:addons] Fix regression on autocomplete popup for the extension inline options
1617369 Lint and Formatting [rust] Reformat the tree using rustfmt
1716903 Graphics: WebRender box-shadow does not draw correctly on inline-box broken into several lines with webrender
1800120 DOM: Content Processes Remove CreateWindowInDifferentProcess
1870722 Audio/Video: Playback [wmfme] make MFCDM clearkey playback work
1898254 Inspector: Rules Display color swatch for the `from` color in relative color syntax
1972426 Nimbus Desktop Client Enabling reading from the NimbusEnrollments table by default outside tests
1980404 Machine Learning: Frontend Chatbot content should be available to WebExtensions
1980638 Performance instrumented-build-macrobenchmark-apk-fenix is always running on autoland, and not actually used
1982130 Onboarding Rename MarketingPageRemovalManagerTest to MarketingPageRemovalSupportTest
1982616 JavaScript: WebAssembly Add ScalarReplacement support for struct.new_default
2012218 Keyboard Navigation In about:keyboard the command (cmd) key is ignored in Linux while it is fine on MacOS
2018237 WebDriver BiDi Only forward in-memory cached JS responses if there is a matching collector
2018904 PDF Viewer Enable pdfjs.enableOptimizedPartialRendering
2021133 Android Studio and Gradle Integration Configure Gradle to use `.mozbuild` JDK via daemon toolchain
2022034 DOM: Content Processes NaN-boxing type confusion in JSIPCValue deserialization
2022183 Widget: Gtk [Wayland] Implement xx-session-management-v1
2022369 Networking: Cookies Heap use-after-free in the parent process in [@ RemoveOldestCookies]
2024186 Firefox Source Docs: Content contributing/contributing_to_mozilla.html Firefox Focus for iOS link is out of date
2026147 DOM: Security High frequency /content-security-policy/inheritance/history.sub.html | History navigation: "about:blank" document is navigated back from history same-origin. - step_wait_func: Wait for the popup to navigate. Timed out waiting | single tracking bug
2026508 Machine Learning: Frontend Intermittent browser/components/aiwindow/ui/test/browser/browser_aiwindow_smartbar.js | This test exceeded the timeout threshold. It should be rewritten or split up. If that's not possible, use requestLongerTimeout(N), but only as a last resort. Test r
2027081 WebRTC High frequency /webrtc/simulcast/screenshare.https.html | single tracking bug
2028824 Search Permanent CI Windows 11 25H2 browser/components/urlbar/tests/browser/browser_searchModeSwitcher_keyNavigation.js | single tracking bug
2028880 JavaScript Engine Assertion failure: IsValidDuration(dateDuration) in Duration_round with seconds: -(2^53-1)
2029192 UI Widgets Convert moz-select variables into JSON design tokens
2029644 XPCOM Improve clarity of CreateUnique length checks
2031675 UI Tests TAE - Add defaultValues selector groups to efficiency pages to match them with new nav-reachability tests
2032128 Machine Learning: Frontend Intermittent browser/components/aiwindow/ui/test/browser/browser_aiwindowui.js | single tracking bug
2032214 Inspector: Rules Many DOM Mutation still occurs when updating the rule view
2032944 Site Reports poki.com - Game fails to fully load, stopping at 80% and blocking users from entering the game
2033285 History When Browsing history is selected in Delete browsing data on quit, open tabs are also cleared
2033303 Networking Testcase calling N TLS sessions takes 10minutes+ and keeps the Socket thread very busy. Closing the browser inbetween also causes shutdown to be blocked for minutes.
2033541 Tabs [Tab Groups] Tab group is deleted when the group is selected during tab multiselection and then chosen as a destination to add tabs to
2033543 Tabs [Tab Groups] Add a "beta" label/chip
2033899 Panning and Zooming Add logging of passed snap targets to ScrollSnap::GetCandidateInLastTargets
2033934 Protections UI Update /browser_address_doorhanger_confirmation_popup.js to work with trustPanel enabled
2034292 DOM: Core & HTML Fullscreen Keyboard Lock does not intercept ctrl+tab and keyboard events dispatched to chrome listeners
2034462 Tooling Investigate impact of App memory limits
2034554 Networking: Cache Block dcb/dcz content from content processes
2034557 Networking: Cache Failure fetching dictionaries from the cache can cause hung channels
2034892 Performance Update uses of symbolicator-cli to new profiler-edit name
2034935 WebRTC Can't see remote participant in MS Teams unless they toggle their camera off and on
2035048 Graphics: WebGPU allow running tests in webgpu jobs if their path matches webgpu
2035082 Security: PSM PKCS11 tokens PIN validation require click while using external keypad validation
2035083 CSS Parsing and Computation CSS highlights not rendering on inserted text nodes
2035096 Disability Access APIs With narrator running, enter doesn't work to select an item in an ARIA multi select listbox
2035120 General Add is_destroying flag to toolbox server error pings
2035330 Tabs Tabs within closed tab groups should not be counted towards the tabs tray's tab counter
2035423 Site Reports www.ifao.egnet.net - Gallery images are not opening when clicked on
2035445 Audio/Video: Playback When I play HDR video on macbook on external hdr screen video is overexposed, when I use internal macbook screen everything work fine
2035470 Tabs The last active tab in tabs tray is behind the search icon, three-dot menu, and "+" options
2035608 Performance Run sp3 at a consistent port
2035634 General Consider adopting -dwarf-linkage-names=Abstract
2035660 Shell Integration Change IOpenWithLauncher PDF flags from 0x84 to 0x2004 for better "from now on" dialog on Windows 10
2035679 General Assert in QuotaCommon code due to path separator mismatch on Windows
2035842 Relay Firefox Relay CFR - CTA Button Navigation
2035843 DOM: Core & HTML Perma Assertion failure: !element->OwnerDoc()->ObservesAutoSizesImage(*element), at checkouts/gecko/dom/base/Document.cpp:X - when Gecko 152 merges to beta on 2026-05-18
2035897 Performance We capture sp3 gecko profiles in CI which are too big to be loaded
2035913 Graphics: WebGPU Update WebGPU CTS to new version 3b327ebc44f11212fd3872972a6dd394634fb9e3 from 2026-04-29 16:10:30
2035948 Bookmarks Localize string for imported bookmark folder
2035975 DOM: Animation Perma Assertion failure: std::isfinite(progress) (Progress value should be finite), at checkouts/gecko/dom/animation/AnimationEffect.cpp:X
2035997 Homepage Add a Debug Tool for the Homepage Sports Widget
2036030 Address Bar Unified search button popup doesn't close when installing open search engine
2036050 Graphics Provide Neon version of nsRect::Intersect
2036071 Graphics: WebRender Debug builds of WebRender on FreeBSD panic on subtraction underflow
2036181 Tabs Hide 'Share' icon from expanded Tab Group unti functional in V1B
2036197 Audio/Video: Playback Use the hardware decoder for Widevine when available.
2036482 Widget: Cocoa [Cocoa] Have PointerLock use native APIs
2036615 CSS Parsing and Computation Compat issue caused by CSS.supports change
2036683 JavaScript Engine Error.captureStackTrace filter: filtered frames consume stackTraceLimit budget
2036689 UI Tests Intermittent UI test failure - < AddressAutofillTest.verifyAddAddressViewTest >
2036716 NSPR NSPR os_Darwin.s should declare itself as needing CPP via ASFLAGS
2036774 WebDriver BiDi MOZ_RELEASE_ASSERT(IsTop()); in GetDownloadFolderOverride when enumerating properties of a child BrowsingContext
2036775 Lint and Formatting ./mach format --help should list which linters will run
2036778 MathML Rename HTMLOrForeignElement to HTMLOrSVGOrMathMLElement
2036792 IP Protection FxA Oauth Token destruction is racy.
2036815 Graphics: WebRender Use the quad shaders for images in simple cases
2036835 Homepage Update View Schedule click action for the Homepage Sports Widget
2036839 Audio/Video: Playback 17.77 - 17.53% ts_paint + 1 more (Linux) regression on Wed April 29 2026
2036853 General Revise toolkit.zoomManager.zoomValues to allow for more fine-grained zooming
2036856 Experimentation and Telemetry Change active_first_day event for first run event
2036872 Audio/Video: GMP Use IPDL refcounted actors for GMP
2036882 New Tab Page Newtab wrap blockedSponsor pref parse with a try/catch
2036887 JavaScript: WebAssembly Include struct OOL pointers in wasmCallAliasSet
2036918 Tabs Fix allignment issue for confirmation dialog when closing the last tab of a tab group
2036951 Layout Allocate reference counted objects using `MakeRefPtr` in various places in layout
2036981 XUL Modernize nsXULPopupManager::sInstance to use StaticRefPtr
2036987 Marionette Client and Harness Disable process output storage to reduce memory pressure during test runs
2036989 Layout Use GetOrCreateDeletableProperty more broadly, to reduce manual 'new' usages
2037026 Netmonitor Cycle dependency for --toggle-disabled-thumb-color
2037097 Audio/Video: Playback Assert FFMPEG_MAX_MAJOR_VERSION stays in sync with sonames and AV_FUNC bindings
1846742 Site Reports [Top 100] Nothing happens when selecting and validating a search suggestion with the keyboard on microsoft.com
1850813 Enterprise Policies Add a test for missing policy description in policies-descriptions.ftl
1856915 Site Reports The button to show/hide password is missing (or clipped) from the right side of the password field on login.yahoo.com
1868773 Performance [perfdocs] Move perfdocs out of mozlint, and into mozperftest
1886285 Interventions Add an intervention for a group of sites using -webkit-scrollbar
1899048 Site Reports www.datanyze.com - Firefox is unsupported browser
1902395 Site Reports www.bancoentrerios.com.ar - Firefox is unsupported browser warning
1902475 Site Reports cdk.fairgoau.com:3572 - Firefox is an unsupported browser
1902596 Site Reports kuzefukuandsons.com - The page is not supported by browser
1925937 Site Reports www.gazetasp.com.br - The page header navigation menu has unnecessary scrollbars present
1932624 Memory Allocator Have a less expensive book-keeping for mRunsAvail
1947407 Site Reports y.qq.com - Firefox is an unsupported browser
1947682 Site Reports www.boostapp.io - Firefox is not supported
1960316 Site Reports wms.sso.biglobe.ne.jp - Firefox is not supported
1966918 Experimentation and Telemetry Add a durationSinceLastInteraction field in the engine_tab.reloaded event that measures the time since last interaction of the tab.
1979358 General Integrate application-services into the build tree.
1983780 WebDriver BiDi Intermittent Wd /webdriver/tests/bidi/input/perform_actions/navigation.py | test_pointer - webdriver.bidi.error.UnknownErrorException: unknown error <...> EventUtils.js | single tracking bug
1988440 Release Automation Build nightly flatpak as org.mozilla.firefox_nightly
1994161 Downloads "Download completed" snackbar is not displayed after navigating to Downloads page via "Details" button from "Download in progress" snackbar
1999488 Site Reports www.languageacademy.com.au - Unsupported pop-up displayed
2002669 Protections UI Update popupNotifications test to work with trustPanel enabled
2002672 Protections UI Update browser_bookmarks_toolbar_drag_with_chevron.js to work with trustPanel enabled
2003011 Site Reports ehealth.gov.gr - Layout of the page is rendered broken
2008773 Performance Add telemetry for kill reasons in the "switch to a different app and back to Firefox" case
2010656 JavaScript: Internationalization API Update in-tree documentation for ICU updates
2015669 Design System and Theming Move `LinkText` into AC
2018543 Site Reports lacunacoil.com - Buttons are not working
2019825 Tabs [Drag and Drop] Drag Tab Group into Tab Group (Merge Groups)
2023711 General Nova styles for floating chrome and sidebar
2024407 IP Protection [a11y] Progress bar in the Settings VPN section is not readable when HCM is enabled
2028660 Tabbed Browser Permanent CI Windows 11 25H2 browser/components/tabbrowser/test/browser/tabs/browser_tab_manager_groups.js | single tracking bug
2029092 Frontend Add exhaustive test coverage for tabs.move() and split views
2029571 Site Reports neuteringmarket.eu - "Fund" buttons are not working
2030410 Privacy [IPProtection] Refactor IPProtectionHandler.StateInfo from using Int to enum
2031293 New Tab Page ASROUTER_NEWTAB_MESSAGE should use the same border radius as Shortcuts and content cards on the newtab
2031698 Tooling Add swipe gesture to move fox
2032599 IP Protection Update unauthenticated panel UI
2033404 Settings UI Cannot use the keyboard to change to custom history settings with the new radio design "history2"
2033430 Machine Learning: General Conversation Starters are not cached and regenerated on tab switch
2033777 Site Reports eu.bbcollab.com - "Uh-oh. Firefox 150.0/152.0 isn't supported." message is displayed
2033893 Sharing handle fxa flow start/end
2033922 Address Bar indicate when pages use a certificate issued by a third-party root
2033935 Protections UI Update browser_relay_signup_flow.js to work with trustPanel enabled
2034198 Themes Import Nova tokens from Figma round 2
2034226 Privacy Add support for feature availability by region and make it configurable with Nimbus
2034279 New Tab Page Clocks Widget: read-only version
2035225 Mozbase Record mozleak events as markers in resource usage profiles
2035230 JavaScript Engine JS::RemoveAssociatedMemory should work in background finalizers
2035529 SVG Fix some tests in SVGGraphicsElement.getBBox-05.html
2035633 New Tab Page Clock widget: Add editing and moving clocks
2035734 Graphics: WebRender Box shadow renders incorrectly
2035852 Privacy: Anti-Tracking Crash in [@ mozilla::FilterListLoader::~FilterListLoader]
2035956 IP Protection Intermittent [TV] browser/components/ipprotection/tests/browser/browser_ipprotection_locations_list.js | test_locations_list_default_rendering - checkmark should be hidden on unselected US button - false == true
2035981 Sync Send Tab clicks from the app menu are misattributed to fxa_avatar_menu instead of fxa_app_menu
2035983 Experimentation and Telemetry Persist lastVisibleAt in session storage so duration_since_last_visible_seconds is available after full app session restores
2035989 Widget: Cocoa File > Open File... produces unusable file picker when no windows are open on macOS
2036036 IP Protection IP-Protection: Improve the separation between the Desktop frontend code and the IPP AuthProvider
2036192 Widget: Cocoa Add profile container App Group to production entitlements for Release and Beta channels
2036241 New Tab Page Sports widget - Add "follow teams" flow
2036259 JavaScript: Standard Library Assertion failure: ISODateTimeWithinLimits(endDateTime), at js/src/builtin/temporal/Duration.cpp:2730
2036318 DOM: Bindings (WebIDL) ObservableArray has null prototype but still behaves like an Array
2036329 Graphics: ImageLib jxl decoder flush pixels when nothing has changed
2036371 General Enable browser-chrome tests on windows asan that use openNewBrowserWindow or waitForNewWindow
2036447 Homepage Refactor HomeFragment onCreateView and onViewCreated methods
2036569 Widget: Win32 double-free in Windows AudioSession constructor failure cleanup due to COM notification refcount gap before `sService` ownership
2036598 Homepage Expose FenixHomeToolbar as a composable
2036671 Browser Engine Migrate BlockedInfoBanner to use InfoCard component
2036674 JavaScript: Internationalization API Intl.DurationFormat strips significant trailing zeros from millisecond/microsecond values
2036730 Graphics: WebRender businesscard.wolfwings.us - Background grid animation is incorrectly played
2036768 Marionette [wdspec] The tests in `detect_crash.py` can't tell between an empty crash report and a well-formed one
2036780 Graphics: ImageLib upgrade jxl-rs to just past 0.4.3
2036889 JavaScript Engine Add performance investigation skill
2036919 CSS Parsing and Computation Use Write::write_char when serializing a QueryExpressionValue::BoolInteger
2036948 Messaging System [TOS] Update showModal to use gBrowser.selectedBrowser
2036952 New Tab Page Send Merino requests over HTTP for the weather widget
2036964 New Tab Page Sports widget - Add key dates strings
2036970 General Make Modifier receiver explicit on Modifier-extension factories
2036971 General Fix geckoview-junit test assertions that were bypassed on Kotlin <2.4
2036977 Web Audio Honor fp-contract=no to reduce fingerprinting in Web Audio
2037001 Homepage World Cup widget and Secret Settings option not translated and have broken RTL layout in Arabic locale
2037021 Tooling Investigate impact of changes in implicit URI grants
2037075 Applications: MozharnessCore mozharness: skip display checks (refresh rate / resolution) on headless macOS VM workers
2037077 Crash Reporting Update the distro versions we scrape automatically (OpenSUSE, Fedora and Alpine)
2037112 DOM: Core & HTML Remove NAC scope reparenting code.
2037148 DOM: Bindings (WebIDL) Refactor HTMLHyperlinkElementUtils
2037158 Interventions Automated test fixes for webcompat interventions during the v152 cycle
2037172 DOM: Core & HTML Remove FrameLoader wrapper reparenting
2037175 IP Protection IP-Protection: fetch entitlement each time an FxA authentication is detected (FxA activate auth flow)
2037183 SVG Use MakeAndAddRef instead of do_AddRef where appropriate
2037192 Homepage Add new string changes for the Homepage Sports Widget
2037193 Experimentation and Telemetry Allow more marketing campaign users to opt in to marketing ToS
2037243 Enterprise Policies Addons that are force installed should not have updates disabled
2037250 New Tab Page Newtab widget fixing context menu
2037281 New Tab Page Newtab widget context menu button isn't set properly for contrast fix
2037282 New Tab Page Newtab nova if a wallpaper is set, and then turned off, it won't come back on if the same wallpaper is selected again
2037287 PDF Viewer Update PDF.js to new version cd1b5f57c72543a4f02cd16f91a6c5abc7c334c5 from 2026-05-05 20:52:39
1729352 DOM: Content Processes Consider segmenting "web" content processes based on originAttributes
1742061 Networking Use NodeServers.sys.mjs to create HTTPS for xpcshell tests (where needed)
1825286 WebRTC: Audio/Video Implement MediaDecodingType/MediaEncodingType "webrtc"
1828282 Enterprise Policies Import bookmarks button on Bookmarks Toolbar bypasses DisableProfileImport enterprise policy
1893707 Disability Access APIs ARIA: remove aria-expanded from supported attributes from role listbox
1960684 Disability Access APIs Intermittent Assertion failure: mGeckoAccessible->IsRemote() || mGeckoAccessible->AsLocal()->IsRoot() || mGeckoAccessible->AsLocal()->AsDoc()->ParentDocument() (Non-root doc without a parent!), at /builds/worker/checkouts/gecko/accessible/mac/MOXWeb
1963448 XPCOM Add a size hint option to IOUtils.writeJSON
1977813 Security: Process Sandboxing Move pre-sandbox lowering warm-up and loading to SandboxTarget for content process
2002854 General Update app-services stub toolchains to use app-services and no longer be stubs.
2011307 DOM: Content Processes Remove test-only support for marking chrome:// URI as needing to be loaded remotely
2011326 DOM: Content Processes Deduplicate process selection logic between E10SUtils.sys.mjs and ProcessIsolation.cpp
2014064 General Add sessionHistory resource
2016121 Application Panel If you open a remote debugging session against Android with the devtools.application.sessionHistory.enabled pref on, parent process hangs
2022156 Password Manager Implement LoginStorageAuthenticator
2023169 Address Bar Create new Labs quickaction
2023450 Layout Honor CSS display for appearance: {base,base-select}
2023572 General Tracking the update to NSPR 4.39
2023685 Sidebar Nova styling for all sidebar panels
2026823 Machine Learning: Frontend [Nova] Update suggestions panel and item styling
2028947 Sidebar Remove the highlight from the sidebar button in horizontal mode when the launcher is visible
2029258 Form Autofill Update styles for "Save credit card" doorhanger
2031207 Accounts and Sync Update Fenix to avoid direct use of the session token and use webchannel-specific methods instead
2031387 Tabs [Tab Groups] Remove TabGroupAction.FormDismissed
2031600 Site Reports indeed.com - Missing passkey support
2032239 Sidebar Record telemetry for events within sidebar panels
2032367 WebExtensions Firefox Android chrome.tabs.query({windowType: 'normal'}) broken
2033157 Tabs [Tab Groups] When closing a tab in a tab group the thumbnail grid displays the wrong thumbnails
2033807 Perfherder Investigate mozperftest-tools 0.4.4 integration issues
2033826 Address Bar Don't autofill unvisited bookmarks when adaptive autofill is enabled
2034355 Site Reports rok.lilith.com - The page is blank
2034367 JavaScript: WebAssembly Improve performance of wasm wide-arithmetic on x86_64
2034409 Site Reports www.wanyiwan.top - "The browser is not yet compatible" message is displayed on the top of the page
2034507 Address Bar Simplify search mode switcher item activation in tests
2034585 Experimentation and Telemetry Firefox Labs is not found using the Settings search bar
2034895 Source Code Analysis Run static analyzer on each header that has a matching implementation
2034952 Graphics: Color Management specific youtube short plays at less than 1 fps
2034991 JavaScript Engine: JIT Make Aarch64 JIT compatible with SpiderMonkey sandbox's reserved registers
2035235 Audio/Video: Playback Running TestMediaDataDecoder in isolation on Windows crashes in xul!mozilla::WMFVideoMFTManager::InitInternal
2035358 Settings UI Prepare Preferences tests for the SRD pref flip
2035485 Site Reports ncvtmis.gov.in - Firefox is not an unsupported browser
2035503 Inspector: Rules Hovering and clicking an SVG background image shows a chrome:// url instead of the real URL
2035818 Experimentation and Telemetry [UI] Update Firefox Labs header to purple container
2035950 General devtools-reps is using React.createFactory, causes spammy warnings when running profiler tests
2035986 CSS Parsing and Computation :playing pseudo-class does not work when :paused pseudo-class is not used
2036198 Settings UI Prepare applications tests for the SRD pref flip
2036199 Crash Reporting Breakpad build failed on Windows using VS2026 due to removal of stdext
2036343 Performance Disable variant expiration for perfdocs
2036484 DOM: Core & HTML Crash in [@ NS_CycleCollectorSuspect3 | nsCycleCollectingAutoRefCnt::decr] via PermissionStatusSink
2036506 General Update AndroidX Compose to version 1.11.0
2036578 General Implement the usernameFragment and foundation fields of RTCIceCandidateStats
2036672 JavaScript Engine Assertion failure: digit != 0 (zero case should have been handled in toString), at js/src/vm/BigIntType.cpp:1336
2036751 Performance Engineering Enable telemetry alerting on a number of important perf probes
2036828 Firefox Source Docs: Content Add Dale Harvey as Security and Privacy UI peer
2036864 AI for Development Ignore claude scheduler lock file in VCS
2036961 Firefox Source Docs: Content HCM media query documentation should describe how to "unset" tokens for HCM
2036969 Tooling Fix Kotlin 2.4-surfaced compiler warnings
2036979 Layout Simplify VsyncRefreshDriverTimer factory methods
2036982 CSS Parsing and Computation Use MakeAndAddRef to replace some new/forget() patterns in layout/style
2036984 CSS Parsing and Computation Allocate reference-counted objects with MakeRefPtr instead of 'new', in layout/style
2036998 Firefox Source Docs: Content docs: set contributors up for smoother reviews: link the AI Coding Policy from the quickref and recommend a fresh-context AI self-review
2037043 Graphics: ImageLib fix simd in libjpegturbo moz.build files
2037052 UI Widgets Make moz-radio-group support aria-label
2037064 Graphics: ImageLib re-enable image/test/mochitest/test_animation_operators.html on macos 15
2037072 Onboarding Don't show the review prompt if the continuous onboarding has not been completed
2037101 AI for Development Install agentic coding tools via cargo-binstall in mach bootstrap
2037120 Form Autofill Remove now-unused Legacy Telemetry autofill instrumentation
2037137 SQLite and Embedded Database Bindings Upgrade to SQLite 3.53.1
2037141 General turn off win11 24h2 xperf-talos tests now that they have been running for 2 weeks on win11 25h2
2037174 Session Restore Remove _lastKnownFrameLoader
2037178 General Perma minGW sandbox/chromium/base/location.cc:70:15: error: static assertion failed due to requirement 'StrEndsWith("chromium\\base\\location.cc", kStrippedPrefixLength, "base/location.cc")': The file name does not match the expected prefix format.
2037182 UI Tests Add custom annotation to track TAE test conversion
2037194 WebRTC Remove heavy WebRTC/signaling MOZ_LOG defaults from test runners
2037224 Panning and Zooming Some simplifications to scroll snap logging code
2037259 IP Protection Progress bar in the Settings VPN section is not equipped for RTL
2037297 Mozbase Perma TV Exception during post-action for download-and-extract: Traceback (most recent call last):
2037302 Widget: Cocoa fix some typos in Cocoa widget code
2037310 Design System and Theming Remove legacy headingResource helper used in InfoCard
2037315 General Update android nightly application-services version bump to new version 455d6cd01cc937112e6a11a9408b14b9f8b38ba5 from 2026-05-06 05:02:25
2037318 Gecko Profiler Codex error: profiler-analysis/SKILL.md: invalid YAML: mapping values are not allowed in this context at line 2 column 311
2037337 DOM: UI Events & Focus Handling Focus lost from slotted element on slot wrapper reorder in shadow DOM
2037348 JavaScript Engine Add support for transplanting WindowProxies to newGlobal
2037353 IP Protection IP-Protection: use 'fxa' auth provider on android by default
2037356 DOM: Core & HTML Enable dom.pointer-lock.native-lock.enabled by default on macOS
2037367 Widget: Cocoa [Cocoa] mousemove event can contains an incorrect `buttons` value while pointer is locked with native API
2037371 Preferences: Backend ASan detected leak in PrefWrapper::GetStringValue()
2037470 SVG Create and use nsIFrame::GetOrCreateReleasableProperty
2037478 General Use consistent typedef for _XScreenSaverQueryExtension_fn across compilation units
2037500 Homepage Add new string changes for the Homepage Sports Widget
2037510 Widget: Cocoa macOS: clear native notifications from private browsing when private browsing windows close
2037521 Applications: MozharnessCore mozharness: suppress misleading refresh rate / resolution error output on headless VMs
2037528 Design System and Theming Deduplicate icons in Fenix that exist in ui-icons
2037538 Widget: Win32 `MozDialog` renders identical to `ButtonFace` in HCM, should be `Window` to ensure fg/bg readability
2037598 Address Bar Send Merino requests over HTTP for offline weather suggestions
2037604 WebRTC: Audio/Video media.webrtc.hw.h264.enabled doesn't affect WebRTC hardware support query on MacOS
2037607 WebRTC: Audio/Video Fix worker thread lifetimes in Media Capabilities
2037615 Themes `popup.css` uses deprecated panel variables
1682481 Inspector Stop using private property inspector._destroyed outside of Inspector
1812100 General Regression: The new swipe-to-navigation indicator stucks for a moment, when deciding not to navigate the other page
1942663 Onboarding Revert the change made to canShowNotificationPage in 1942326
1979864 Address Bar Second character on address bar stops autocomplete
2000191 Accounts and Sync Intermittent mozilla.components.feature.syncedtabs.storage.SyncedTabsStorageTest.tabs are stored when loaded | Argument(s) are different! Wanted:
2005702 JavaScript: Internationalization API Treat islamic-rgsa as an unknown calendar identifier
2008413 WebAuthn Crash in [@ java.lang.IllegalStateException: at org.mozilla.geckoview.GeckoResult.complete(GeckoResult.java)]
2012760 Site Reports Jank and freezing on snowplowmap.a2gov.org
2013672 Machine Learning: On Device High frequency | toolkit/components/pageextractor/tests/browser/browser_dom_extractor.js | single tracking bug
2014443 Mochitest Using prefs entry in mochitest browser manifest only works in DEFAULT, not per-test (should either toml lint for this or fix)
2016876 DOM: Animation Add ViewTimeline interface and its readonly attributes
2018167 Tooling Investigate impact of Background audio hardening
2020990 Alerts Service Cannot unsubscribe from notifications via Windows 11 toast notification
2023185 Homepage Remove 'Collections' onboarding placeholder card from homepage
2023619 Tabbed Browser Nova tab strip visual updates
2023825 Enterprise Policies DisableFirefoxAccounts policy also disables Backup and others after settings redesign
2025249 Site Reports infyspringboard.onwingspan.com - Firefox is not a supported browser
2027179 Disability Access APIs Promisify hyperlink a11y mochitests.
2027180 Disability Access APIs Promisify attributes a11y mochitests.
2027181 Disability Access APIs Promisify relations a11y mochitests.
2027182 Disability Access APIs Promisify text a11y mochitests.
2027183 Disability Access APIs Promisify name a11y mochitests.
2027184 Disability Access APIs Promisify textcaret a11y mochitests.
2027185 Disability Access APIs Promisify tree a11y mochitests.
2027186 Disability Access APIs Promisify selectable a11y mochitests.
2027877 Machine Learning: Frontend [Nova] Add blur treatment to top and bottom of Smart Window
2027896 Machine Learning: Frontend [Nova] Update Memories panel styling and delete icon
2028096 Networking Intermittent netwerk/test/unit/test_cookies_async_failure.js | single tracking bug
2028916 Tooling Investigate impact of Per-app keystore limits
2029090 UI Tests Intermittent UI test failure - < BookmarksTest. moveBookmarkToDifferentFolderTest>
2030260 Debugger Guard against IDBTransaction errors when retrieving pending breakpoints
2030526 Privacy [IPProtection] Add error snackbar handling
2031341 Search Resolve TypeScript issues in search.mjs
2031506 Machine Learning: Frontend Add action output with summary and undo for natural language actions
2031508 Machine Learning: Frontend Add expanded action output for natural language actions
2031510 Machine Learning: Frontend Update expanded action output after undo
2031640 IP Protection Usage value separator inconsistencies between main panel and warnings/infobars
2031989 Privacy Implement the stack to query the gecko database for blocked trackers
2032255 Tabs [Tab Groups] Support reordering TabGroup TabItems
2032348 Site Reports www.av-connection.dk -Desktop layout is loaded instead of mobile site on Android
2032981 Networking: HTTP Allow configuring Happy Eyeballs resolution delay and connection attempt delay via prefs
2033468 SQLite and Embedded Database Bindings Ci.NS_ERROR_UNEXPECTED doesn't exist in Sqlite.sys.mjs
2034249 Audio/Video: Playback Support HDR transfer function and metadata in PlanarYCbCrImage for software-decoded video
2034310 General Remove or update metrics expiring at the end of Firefox 152: data_leak_blocker.report_v1
2034387 Password Manager Re-enable Rust-Mirror tests on CI
2034499 Geolocation Provider Rejecting to enable system permission does not fire error callback for getCurrentPosition and watchPosition
2034519 Protections UI Perma browser/base/content/test/sync/browser_sync.js | test_overflow_navBar_button_visibility - Uncaught exception in test | When Gecko 152 merges to beta on 2026-05-18
2035232 Form Autofill Address autofill ML experiment
2035237 Mozbase Record LSan leak events as markers in resource usage profiles
2035304 DOM: Editor EditContext basics (attaching/detaching, getters/setters)
2036176 Privacy Create IPProtectionBottomSheet Fragment and Manager
2036237 Startup and Profile System URL from Apple Event / command line is lost when old profile manager dialog relaunches Firefox
2036777 Graphics Remove redundant logic for SSE vector instruction detection
2036844 PWA Fix and re-enable the PWA UI tests disabled with the Compose 1.11 update
2037099 Geolocation Provider Remove GLS key from Windows
2037157 Privacy [IPProtection] Add new entry points for custom auth flow
2037293 Settings UI Prepare sync tests for the SRD pref flip
2037316 Panning and Zooming Make scroll snap logging more terse
2037347 SVG re-enable text-clipped-offscreen-move-onscreen.html
2037357 General Rename conflicting static variables in extended unified build context
2037361 Address Bar Middle click on "arrow" icon in the search bar doesn't open search in new tab
2037374 UI Tests Remove obsolete verifyShareUrlBarTextSelectionOptionTest UI test
2037396 Graphics: ImageLib show progressive jxl images much sooner
2037511 Raptor Temporarily disable power test option in tp6m
2037547 Widget: Cocoa Sharing a page from the touch bar no longer includes the page title
2037550 Audio/Video: Playback Most videos on Netflix won't play - Error Code F7361-1253 / F7333
2037558 JavaScript: Internationalization API Don't eagerly resolve calendar for Temporal objects
2037561 Fuzzing Increase AFL++ coverage bitmap size
2037568 IP Protection Fix X button for tabs gettting bigger whenever location selector is rendered
2037574 General Deduplciate implementation of GetStorageKey in security/manager/ssl/*.cpp
2037577 General Dedpulicate implementation of MarkPrincipalChildrenDirty()
2037627 Tooling Pick up 2026-05-06 AndroidX dependency bumps
2037629 Security Use in-tree nss-rs for mls_gk, lockstore_rs and transitively to all new nss-rs consumers
2037631 DOM: CSS Object Model Add `auto` to ScrollIntoViewOptions and use it PresShell::GoToAnchor
2037632 Layout Make `auto` default for Element.scrollIntoView
2037633 XUL Switch to use do_AddRef(new) to allocate nsXULPopupManager::sInstance
2037649 Privacy [IPProtection] Show VPN button in the menu on a tab
2037671 IP Protection Remove info button in locations subview
2037693 Layout Use MakeAndAddRef instead of 'new' to construct objects stored in local nsCOMPtrs, in various places in layout
2037717 Audio/Video: Recording Perma backlog [tier 2] /mediacapture-record/MediaRecorder-canvas-media-source.https.html | expected TIMEOUT | single tracking bug
2037732 New Tab Page Add Sports widget to feature manifest
2037735 General Revendor app-services, removing dupe entries from moz.build files.
2037752 DOM: Core & HTML Change static variables in nsTreeSanitizer.h to use StaticAutoPtr/StaticRefPtr instead of manual new/delete/NS_RELEASE
2037754 DOM: Core & HTML Use MakeAndAddRef instead of new when allocating arg for nsContentUtils::AddScriptRunner
2037755 General Remove skipped test browser_editablemodel_allproperties.js
2037756 New Tab Page Sports widget - Fix DATETIME string format
2037761 XPCOM Change RegisterStrongMemoryReporter() to take already_AddRefed<T> instead of raw T*, to discourage bad practice of passing freshly-allocated refcounted objects into functions
2037767 General Update android nightly application-services version bump to new version 6bc810e42711a28b41c85f13af23bb289033c95a from 2026-05-07 05:02:18
2037787 Source Code Analysis Perma static-analysis-autotest AttributeError: 'list' object has no attribute 'items'
2037803 DOM: Core & HTML A password characters are displayed in Print Preview and also printed
2037809 Glean: SDK Memory used by the Glean object and its database
2037824 SVG Perma TEST-UNEXPECTED-FAIL | /svg/types/scripted/SVGGraphicsElement.getBBox-05.html | image with fill, stroke, markers and clipping when Gecko 152 merges to beta on 2026-05-18
2037841 UI Tests Re-enable verifyShowSearchSuggestionsToggleTest UI test
2037843 Security: Process Sandboxing error: use of undeclared identifier 'StartOpenBSDSandbox' after bug #1977813
2037866 Networking nsHttpTransaction::PrepareConnInfoForRetry strips HTTPS-RR alt-route on TLS resumption errors
2037871 DOM: Editor Add use counter for EditContext
2037884 Firefox Source Docs: Content Update the Pocket Guide to include weekly planned dot releases
1829401 DOM: Core & HTML [Cocoa] Support locking the pointer with unadjustedMovement
1898257 Sidebar Remove icon property from sidebar extensions
1968114 Settings UI Convert settings related to Tabs and browsing page to config-based settings
1995789 Enterprise Policies Multiple duplicated setupPolicyEngineWithJson
2000026 Raptor Avoid duplicate profiler-node-tools toolchains
2010193 DOM: Web Authentication Implement WebAuthn Related Origins
2010508 Tabbed Browser: Split View The about:opentabs page can be pinned
2021882 Downloads [Downloads] Fix UI tests after Download file dialog was replace with allow to rename and change location dialog.
2022042 Settings UI Create a separate page called "Passwords and Autofill"
2023691 Tabbed Browser: Tab Groups Nova tab group color token updates
2024029 UI Widgets Handle elements in reorderable moz-box-groups are not labelled
2024195 General Migrate reftest to win11 25h2 worker pools
2025020 Settings UI Ensure the page nav labels match the mockups for all the new pages
2027174 Disability Access APIs Promisify states a11y mochitests.
2027175 Disability Access APIs Promisify focus a11y mochitests.
2027176 Disability Access APIs Promisify hypertext a11y mochitests.
2027177 Disability Access APIs Promisify actions a11y mochitests.
2027178 Disability Access APIs Promisify hittest a11y mochitests.
2027212 Firefox MCP Update `.mcp.json` and `.codex/config.toml` to use mozilla/firefox-devtools-mcp
2027214 Firefox MCP Update docs to reference mozilla/firefox-devtools-mcp instead of padenot/firefox-devtools-mcp
2027897 Settings UI Revise and Clarify AIFeature Interface
2028401 DOM: HTML Parser Sync HTML parser with upstream
2029024 JavaScript Engine: JIT Add additional JIT hints for IC states
2030070 Sidebar Bookmarks and History - should respect the "When you open a link, image or media in a new tab, switch to it immediately" setting
2030144 Privacy [IPProtection] Handle 'learn more' clicks from the IPProtection fragment
2031413 Widget: Cocoa Mouse cursor remains visible after entering HTML5 fullscreen on macOS until mouse movement occurs, even when cursor:none is already active
2031845 Machine Learning: Frontend Update Ask button panel styling
2032156 General Upload autoland Android builds to integration directory
2033158 Performance Add documentation for generating Simpleperf profiles for Speedometer 3 tests on Android
2034056 DOM: Core & HTML Simplify Document::RequestFullscreenInParentProcess()
2034096 Sidebar Navigating updated bookmarks panel with Shift + Arrow Keys breaks selection range
2034274 Audio/Video: cubeb Update audioipc2 and pass trusted client PID to server
2034552 Performance Duplicate Samply dependencies when using both --gecko-profile and --native-profiling in CI
2034625 Tabs [Exploration/Spike] Explore detekt for Acorn design system enforcement
2034738 Web Apps taskbartab attribute is used before it's set
2034767 Private Browsing Update leftover legacy copy of reset pbm button
2035408 Privacy Do not show the onboarding card to a user who has used the VPN feature before (has toggled the VPN on before)
2035572 CSS Parsing and Computation Support calc() expressions that can't be resolved at parse time for all numeric types
2035732 Shell Integration Taskbar pin detection intermittently fails for MSIX installs, causing false unpinned readings
2035854 JavaScript: GC Refactor GCMarker to move methods templated on marking options into MarkingTracerT
2035918 SVG Root SVG element sizing is really weird and doesn't match other browsers.
2035942 Security Felt Privacy error page does not handle SEC_ERROR_CA_CERT_INVALID
2036028 Widget: Gtk [Wayland] Pointer lock doesn't work well on OOP iframe
2036099 Address Bar Update group comment for quick actions to mention using English commas to separate values
2036587 Graphics Content missing when printing PDFs
2036590 Telemetry Requests to incoming.telemetry.mozilla.org are still made even when datareporting.healthreport.uploadEnabled is set to false
2036607 DOM: Web Authentication Use macOS 26.4+ support for the WebAuthn PRF extension for security keys
2036701 web-platform-tests [wpt-sync] Sync PR 59540 - Don't mess with sys.path in environment.py
2036762 Settings UI Remove the "General" pane when SRD is enabled
2036837 Top Sites Permafailing "MerinoManifestProviderTest.GIVEN host is known WHEN fetching the manifest entry is called THEN return the full manifest entry" with the latest automated Merino metadata update
2036891 Networking: HTTP Fenix: Expose Happy Eyeball V3 pref to Nimbus experimentation
2036957 IP Protection Add a pref for IP Protection maxGb display
2036997 Password Manager Handle duplicates during Rust migration
2037024 Password Manager LoginManagerRustMirror: Update version to trigger re-migration
2037159 Address Bar Revert "Perform search when users enters text in urlbar and selects search engine"
2037198 Widget: Cocoa Native anchored menus scale font size but not icon size, causing weird rendering at small zoom levels
2037249 Firefox View Remove now-unused Legacy Telemetry Firefox View instrumentation
2037341 web-platform-tests Update web-platform-tests to ddfb74862dc00e3211cb90efd34819349153694b
2037355 Search Default search engine telemetry in Glean is not always updated, e.g. when the search engine changes its name
2037359 General History.replaceState doesn't work for Session History Diagrams
2037402 Settings UI Default Search Engine pop-ups auto select on initial click when the list is displayed above the button
2037430 Profile Backup Error when restoring a backup file from Mac/Linux in Windows
2037448 Layout: Text and Fonts Underlined text looks like strikethrough with "charter" web font.
2037457 DOM: Core & HTML Entering fullscreen incorrectly exits pointer lock
2037465 General Use AppConstants.MOZ_APP_BASENAME for PreXULSkeletonUI registry path in browser_preXULSkeletonUIRegistry.js instead of hardcoded "Firefox"
2037491 Enterprise Policies Tests should ignore local policies.json
2037545 Memory Allocator High frequency macos gtest | test failed with return code -4 | single tracking bug
2037592 UI Widgets Support aria-haspopup in the "panel-item" component
2037602 Machine Learning: General Load model metadata from RS rather than FALLBACK_MODELS constant
2037647 WebRTC: Audio/Video Simplify MediaCapabilities prefs and webrtc parameter handling
2037714 Graphics: ImageLib Perma macos shippable image/test/reftest/jxl/jxl-size-33x33.jxl == image/test/reftest/jxl/jxl-size-33x33.png | image comparison, max difference: 2, number of differing pixels: 58 | single tracking bug
2037795 Experimentation and Telemetry Enable testing different marketing card variants
2037835 Homepage [a11y] When exiting the webview to homepage, the countdown is read although the search bar is focused
2037838 Mozbase Add Android 17 to the OS to API map
2037844 Widget: Cocoa Several about:preferences dropdowns do not scale with zoom on macOS
2037850 Translations `AppMenu > More tools > Translate...` remains available when browser.translations.enable is set to false
2037864 Audio/Video: Playback build failure on openbsd since bug 2021722 - no libdl
2037873 Layout: Text and Fonts Close FontSubstitutes registry key after use.
2037875 General BrowserUtils.formatURIForDisplay (including trust panel, full screen warning) always shows punycode due to use of eTLD service's getSchemelessSite
2037893 Homepage [L10n] The title of the sports widget overlaps the "x" button in Portuguese
2037911 Tooling Refactor tests and code to prevent using Robolectric ReflectionHelpers
2037934 Experimentation and Telemetry Allow messages to deeplink into AI Controls
2037936 CI Configuration Win11 25H2 GPU reftests use win7 screen profile because mozharness only recognizes 24H2 build
2037953 Relay Firefox Relay Doorhanger UX Upgrade - Mask Expansion, Update Title
2037957 Homepage Revert Bug Bug 2036835
2037962 DOM: Device Interfaces Update Web Serial add-on gating message to mention Bluetooth
2037980 Machine Learning: Frontend Instrument telemetry for Smart Window ↔ Classic Window switching and duration tracking
2038033 New Tab Page Add trainhopConfig support for unified Weather widget
2038068 General Make abseil-cpp available as a Library to non-xul consumers
2038083 PDF Viewer Update PDF.js to new version a5e9940d14d9e103065180cce9305a6d7aaa58ed from 2026-05-07 20:28:48
2038119 UI Tests Update TestRail link for verifyQRScanningCameraAccessDialogTest UI test
2038136 Layout [css-color-5] What is the computed value of light-dark(none, none)?
2038201 DOM: Core & HTML Perma [tier 2] /html/user-activation/navigate-to-sameorigin.html | single tracking bug
2038205 CSS Parsing and Computation Upstream Stylo changes from Servo (Apr 2026)
2038224 Release Automation Ensure `release-partner-attribution` tasks use the correct `ja-JP` / `ja-JP-mac` dependency
790194 WebRTC: Signaling Almost all uses of atoi/strtol/strtoul() in dom/media/webrtc should be replaced
1863212 Widget: Cocoa [private info leak] Share button on MacBook TouchBars leaks private window URL
1895393 Panning and Zooming Populate the FireScrollEvent profiler marker with a stack trace of where scrolling was triggered
1918653 Android Studio and Gradle Integration Make shippable fat AAR builds faster
1959807 Logins Crash in [@ java.security.ProviderException: at android.security.keystore.AndroidKeyStoreKeyGeneratorSpi.engineGenerateKey(AndroidKeyStoreKeyGeneratorSpi.java)]
1991893 Widget: Cocoa Start making use of native popovers on macos
2008045 SVG See if SVGContainerFrame::RemoveFrame should call into nsContainerFrame::RemoveFrame
2014226 DOM: Content Processes Error When Registering Actor More Than Once
2016688 Graphics: ImageLib build jpeg xl code on beta/release builds
2023692 Tabbed Browser: Tab Groups Nova tab group label styles in tab strip
2026246 General Nova floating chrome: translucent background
2026249 Sidebar Nova floating chrome: sidebar expand on hover
2027207 IPC Try turning ValidatePrincipal checks into IPC_FAIL failures
2030831 Android Studio and Gradle Integration Relax application-services dependency version pin on try
2030832 Android Studio and Gradle Integration Restrict in-tree app-services dependency substitution to GeckoView and dependency-download builds
2031107 Graphics: WebRender Crash in [@ alloc::vec::Vec<T>::push_mut]
2031468 Layout: Scrolling and Overflow Consider treating @-webkit-scrollbar as "not supported" for CSS @supports, despite our partial support
2032003 Machine Learning: Frontend The Ask dropdown Chevron is not visible with the Desert High Contrast theme
2032200 Machine Learning: Frontend [Nova] Update Smart Window iconography
2032619 Shell Integration Add a telemetry metric for whether the user has a desktop entry for Firefox
2033019 Design System and Theming Upstream InfoCard from Fenix to compose-base
2033123 Android Studio and Gradle Integration Make `./mach uniffi generate` cover application-services Android Kotlin bindings
2034325 Design System and Theming Uplift PromoCard to compose-base
2034337 CSS Parsing and Computation new attr() + fallback is misbehaving on content property
2034848 SVG Clear cached bounding boxes of parents when child bounds change
2035575 Android Studio and Gradle Integration Wire in-tree application-services through the fat AAR and artifact-build pipelines
2035593 IP Protection Show catastrophic error screen when Guardian returns a 500 error.
2035799 Networking Perma Hit MOZ_CRASH(Attempting to connect to non-local address! opener is [resource://gre/modules/addons/AddonRepository.sys.mjs:825:26], uri is - when Gecko 152 merges to beta on 2026-05-18
2036341 JavaScript: GC Investigate removing TraceNullableEdge and related functions
2036419 IP Protection Make locations subview scrollable
2036603 Marionette Client and Harness Fix stale references and broken links in Marionette docs
2036868 Tabs [Tab Groups] Tabs within tab groups are not displayed in the tab manager's search page
2036941 Graphics: WebGPU Update wgpu to upstream 64394cc7 (2026-5-6)
2037049 IP Protection The text below “Use VPN for this site” is missing
2037186 JavaScript Engine Consider removing some of the transplanting APIs.
2037214 Mochitest Mochitest retry-on-failure crashes with `TypeError: Too few arguments` when transforming a buffered `log`/`ERROR` message
2037223 Mochitest mochitest retry-on-failure suppresses TEST-UNEXPECTED-FAIL for shutdown leaks without retrying the test
2037266 Messaging System Onboarding splash screen targeting is not respecting experimentsGate pref
2037422 General make "FirefoxAccounts ERROR FxA rejecting with error NO_ACCOUNT, details: undefined" more interesting
2037452 General Turn global variable from nsAppShell.cpp into member variable
2037460 General Syndicate all definitions of kRadToDegress ins a single place
2037542 IP Protection Adjust updated keyboard navigation controls for VPN location selector
2037565 DOM: UI Events & Focus Handling Incorrect focus handling for remote frame in shadow dom
2037668 Inspector Perma a11y [tier 2] devtools/client/inspector/shared/test/browser_styleinspector_tooltip-background-image.js | Node is not focusable via the accessibility API: id: | single tracking bug
2037675 General `./mach build` terminal footer flickers during output
2037685 Settings UI Don't load remote browser languages until the Languages pane is rendered
2037695 Tabs TabsTray List/Grid setting does not apply until you exit the app and return
2037719 Graphics: ImageLib Intermittent TV image/test/mochitest/test_jxl_progressive.html | application timed out after 370 seconds with no output
2037734 Mach Vendor & Updatebot moz.build rewriting doesn't take existing file entries into account.
2037749 New Tab Page Sports widget - Add "view matches" string
2037812 Audio/Video: Playback Add nimbus manifests for MediaCapabilities behavior prefs where impl/spec/webcompat situation is unclear
2037888 JavaScript Engine: JIT [riscv64] Incorrect Simulator implementation of several minor instructions
2037909 Layout: Text and Fonts Perma CRASH on enterprise build | gfx/tests/mochitest/test_font_whitelist.html | gfxFontGroup::GetDefaultFont() "unable to find a usable font (sans-serif)"
2037913 WebRTC aboutWebrtc.mjs probably has a broken tab control due to incorrect window.documentGlobal
2037920 General Use more explicit namespace when conflict happen under unified build
2037921 General Clashing sLog definition under unified build
2037929 Bookmarks Remove unused fragment_edit_bookmark.xml
2037950 Bookmarks Remove unneeded fragment_bookmark.xml
2038046 General Make ScrollableLayerGuid default constructor constexpr
2038051 Privacy [IPProtection] Wire up site info icon to ipprotection state
2038060 Privacy Tapping to "Built-in VPN" in the Settings menu does nothing
2038067 Privacy [IPProtection] Wire up main menu to ipprotection state
2038085 Logins Remove unneeded fragment_saved_logins.xml
2038115 DOM: Bindings (WebIDL) Replace MOZ_LIKELY/MOZ_UNLIKELY with C++20's [[likely]]/[[unlikely]] in dom/bindings
2038118 Graphics: Canvas2D Replace MOZ_LIKELY/MOZ_UNLIKELY with C++20's [[likely]]/[[unlikely]] in dom/canvas
2038139 Address Bar Address autofill no longer works without history (cleared/disabled/private browsing) with adaptive autofill enabled
2038150 Bookmarks Enable bookmarks import by default in nightly
2038165 Mozbase Perma [tier 2] tools/lint/test/test_manifest_toml.py::test_unknown_android_version[test-manifest-toml] TEST-UNEXPECTED-FAIL
2038180 Interventions Ship keyboard lock intervention to websites that only support navigator.keyboard.lock
2038207 Glean: SDK Land Glean v67.3.1
2038219 CSS Parsing and Computation Avoid extra work and allocations when resolving non-length calc expressions.
2038252 General Make editor/* compatible with extended unified build
2038253 General Replace macro definition by enumeration in zipstruct.h
2038256 General #undef macros defined locally in widget/windows/*
2038268 Telemetry Remove unused datadir info error metrics
2038296 Homepage Add Group Stage string for the Homepage Sports Widget
2038334 AI for Development Enable auto-update for firefox-aidev-plugins marketplace in Claude Code
2038366 Layout: Block and Inline Add a child frame iterator for nsLineBox
2038409 General Update android nightly application-services version bump to new version 005110a40eb559c13ed0bc878018b2e2d46b7c6d from 2026-05-09 05:01:43
2038419 Graphics: ImageLib enable some jpegxl reftests on macos 15
2038427 DOM: Core & HTML Perma [tier 2] /html/browsers/windows/iframe-cross-origin-print.sub.html | esting http://web-platform.test:8000/html/browsers/windows/iframe-cross-origin-print.sub.html | single tracking bug
2038428 Layout: Positioned Perma [tier 2] /css/css-position/position-absolute-iframe-print-001.sub.html | Testing http://web-platform.test:8000/css/css-position/position-absolute-iframe-print-001.sub.html | single tracking bug
2038429 CSS Parsing and Computation Perma [tier 2] /css/css-viewport/zoom/iframe-zoom.sub.html | single tracking bug
2038435 Networking: WebSockets Perma /websockets/keeping-connection-open/001.html | WebSockets: 20s inactivity after handshake - expected FAIL | single tracking bug
2038438 SVG Perma [tier 2] /svg/styling/svg-filter-render-remote-frame-in-local-frame.tentative.https.html | single tracking bug
2038495 General Use kRadPerDegree in more places
2038512 Layout: Grid Make grid line clamping happen at used value time.
1717176 Inspector Can't change content in box model in inspector for box-sizing:border-box elements
1860622 SVG AutoRestore mCloningForSVGUse
1936921 Bookmarks & History Intermittent browser/components/places/tests/browser/browser_sidebar_bookmarks_telemetry.js | single tracking bug
1974273 Translations Missed removal of translations code?
1974276 DOM: Core & HTML Implement parsing & constructing of selectedcontent element
1994687 Privacy: Anti-Tracking Reduce Page Protection: Telemetry on how often we show the banner
1996306 Privacy: Anti-Tracking Frequent /storage-access-api/storage-access-headers.tentative.https.sub.window.html | single tracking bug
1996741 Security Intermittent browser/base/content/test/about/browser_aboutCertError.js | single tracking bug
2000840 Widget: Gtk [Wayland] Move mFrameCallback to VSync frame callback
2004011 JavaScript: GC Consider using per-zone chunks to allocate GC arenas
2010717 Layout: Block and Inline Implement alignment-baseline: alphabetic/ideographic/central/mathematical/hanging
2013292 General Investigate if we need the visibility animation in UrlInputFragment and refactor it to reduce complexity
2015530 New Tab Page Add stringlist telemetry metric for user-enabled Widgets
2021925 WebRTC: Audio/Video Use-After-Free in PCameras via [@ AggregateCapturer::OnFrame]
2024001 Settings UI Settings search returns entire setting-pane in SRD
2024796 Machine Learning: Frontend Update suggestions dropdown height and overflow behavior
2025861 Address Bar Update search icon layout when permanently shown
2029172 Inspector: Rules Set function expression in data attribute in the OutputParser for CSS explainers
2029185 UI Widgets Convert moz-card variables into JSON design tokens
2029869 Layout: Block and Inline Synthesize vertical font metrics/baselines from the horizontal metrics/baselines
2030021 Privacy: Anti-Tracking Avoid blocking AsyncOpen on URL classification for annotation-only features
2030350 Privacy Show the trackers blocked pill from homescreen in tabs tray also
2030376 Privacy Show the number of trackers blocked this week in the tracking protection dashboard
2030378 Privacy Show how many trackers of each category have blocked this week in the tracking protection dashboard
2030448 Sharing Disable feature if server is 410 Gone
2031106 Security: PSM Remove EV Treatment from SecureSign Root CA12
2031278 Crash Reporting Add unit tests for CrashReports.sys.mjs
2031302 Interventions Support being able to specify more JS interventions without needing to add new JS files
2031312 Sidebar Enable the updated bookmarks panel in Nightly only
2031496 Security: PSM use EU trust mark in desktop qwacs UI
2032589 Privacy [IPProtection] Handle 'Get Started' clicks from the IPProtection onboarding fragment
2034243 Settings UI siteDataSize stays in "calculating" state with settings redesign enabled
2034318 about:logins Some images on the about:Logins page are missing alt text and are not marked up as decorative
2035234 Tabs [Tab groups] Pixel bottom sheet bug when adding an emoji
2035343 Machine Learning: Frontend Implement undo action execution for tool actions
2035421 Privacy: Anti-Tracking Recording shim counter as blocked in tracking DB
2035422 Privacy: Anti-Tracking Record email tracker blocking in the tracking DB
2035425 Protections UI Clicking the Shield icon on the URL bar takes ~3seconds, spending time on QuotaManager I/O thread.
2035514 Networking: HTTP Use HttpTrafficCategory for PHttpTransaction::Init
2035520 Profile Backup findBackupsInWellKnownLocations incorrectly reports 1 found when multiple backups are present
2035600 Privacy: Anti-Tracking Reduce Page Protection: Reenable and let it ride the train
2035749 Audio/Video: Playback Perma Diffoscope [tier2] firefox differs. See the diff.html or diff.txt artifact
2035883 Audio/Video: Web Codecs Support encoding Opus > 8 channels
2036201 Sanitizers Additional TSan suppressions
2036466 Sync Update signed-out flow for firefox view and avatar menu
2036705 Protections UI trust panel site security information: put extended certificate info into a moz-card
2036869 Machine Learning: General Memories quality improvements - at history source level
2036902 New Tab Page Move WidgetsRegistry.mjs to common/
2036904 DOM: Core & HTML [Windows] Support locking the pointer with unadjustedMovement
2036945 Tabs [Tab Groups] Add UI tests for the add to group bottom sheet
2037066 Messaging System The Smart Window Keep Closed Modal will not show the Blue keyboard focus ring for any button or frame
2037084 Task Configuration Add macosx1500-aarch64-vms test platform for headless VM workers
2037352 IP Protection IP-Protection: expose `enroll()` to android
2037587 Toolchains Firefox ASAN binaries using 100% CPU on macOS 26.4.1 with latest clang toolchain
2037599 Performance: Navigation Enable dom.script_loader.external_scripts.speculate_link_preload.enabled
2037700 Graphics Use MakeRefPtr/MakeAndAddRef to allocate gfxSurfaceDrawable
2037715 Audio/Video: Playback Add infrastructure to track uncontrollable audio sources in MediaController
2037718 Marionette Client and Harness source-test-python-marionette-harness files-changed should include testing/marionette/client
2037827 DOM: Core & HTML Expose Console.createInstance to WorkerDebugger scopes
2038078 JavaScript Engine Perma [tier 2] js/src/jit-test/tests/1659595.js | Unknown (code -11, args "") [0.2 s]
2038079 Toolbar Clean up unused search selector code in Fenix
2038188 IP Protection Unify init of IPPAndroidSignInWatcherSingleton with the other Components
2038206 Theme [Win][HCM]Inactive(disabled) buttons are displayed as active while High contrast Mode is enabled
2038249 UI Tests Improve Robo test CI error messages when no crash logs are found in GCS
2038266 Machine Learning: General Smart Window: add Merino World Cup tool call
2038282 DOM: Device Interfaces Make Web Serial support opt-in for enterprise policies
2038332 New Tab Page Update Lists animation trigger from 5 to All list items complete
2038340 Performance Temporarily reduce Windows perf test load during windows PSU replacement
2038344 Privacy [IPProtection] Wire up ip protection fragment to ipprotection state
2038349 Address Bar Urlbar engagement telemetry cannot identify which action was picked when actions row contains multiple actions
2038364 Task Configuration jsreftest Windows debug CI tasks relatively often time out
2038377 Shell Integration Perma [tier2] | browser/components/tests/marionette/test_no_errors_clean_profile.py | AssertionError: Lists differ: [{'message': 'TypeError
2038405 General Devtools inspector rules right click menu not localized in multi-locale builds
2038430 CSS Parsing and Computation Perma [tier 2] /css/CSS2/normal-flow/cross-domain-iframe-paint-order.sub.html | single tracking bug
2038431 CSS Parsing and Computation Perma [tier 2] /css/css-color-adjust/rendering/dark-color-scheme/color-scheme-iframe-background-mismatch-dynamic-cross-origin.sub.html | single tracking bug
2038433 Layout Perma [tier 2] /css/css-sizing/responsive-iframe/responsive-iframe-cross-origin-no-match-element.sub.tentative.html | single tracking bug
2038436 web-platform-tests Frequent [tier 2] ValueError: Unknown action bidi.emulation.set_locale_override | single tracking bug
2038440 DOM: Events High frequency /pointerlock/pointerlock_promise.html | TestRunner hit external timeout (this may indicate a hang) | single tracking bug
2038471 CSS Parsing and Computation Share common CssUrl logic among Gecko and Servo
2038549 Graphics: WebRender Change plane splitting to operate in root space of preserve-3d context
2038576 Graphics Update angle cherry-picks
2038585 IP Protection IP-Protection: allow android activation without sessionstore-windows-restored event
2038591 Layout Perma [tier 2] /intersection-observer/cross-origin-tall-iframe-rendering.sub.html | single tracking bug
2038604 New Tab Page 13.25% perf_reftest_singletons insert-subtree-not-nth-edge-has-pseudo.html (OSX) regression on Fri May 1 2026
2038606 General Add documentation for merino wcs component
2038634 UI Tests Match manual tests with automated UI tests by adding missing TestRail links
2038654 JavaScript Engine Rename investigation skill until generalized
2038665 Lint and Formatting diskarzhan linter breaks clang-format for ./mach lint --fix
2038729 Settings UI update-application-auto should have not been reused in settings redesign
2038731 Release Automation drop `required_signoffs` and `signoff_urls` attributes/parameters
2038746 Storage: localStorage & sessionStorage Use MakeRefPtr to replace "RefPtr<T> foo = new T()", in storage/
2038767 Layout Use GetOrCreateDeletableProperty in a few more places
1430064 geckodriver Firefox does not exit when geckodriver is terminated
1741790 IME Intermittent org.mozilla.geckoview.test.TextInputDelegateTest#inputConnection_selectionByArrowKey [#<something>] | single tracking bug
1758306 General Handle <all_urls> used as an API permissions in MV3 properly
1776014 File Handling Intermittent uriloader/exthandler/tests/mochitest/browser_auto_close_window.js | single tracking bug
1878994 Layout: Positioned Firefox fails WPT /css/css-anchor-position/position-try-tree-scoped.html
1950303 Layout: Scrolling and Overflow 'contain:layout' should prevent wide abspos elements from inflating the mobile viewport
1997621 JavaScript: WebAssembly ESM: Support source phase imports of wasm modules
1999036 Lint and Formatting Flesh out Temporal definitions for TypeScript and ESLint
2012757 Tabs [Spike] Investigate favicon loading issue
2016937 XPCShell Harness Perma testAddTaskTestRejectedUndefined | expected PASS
2017972 Machine Learning: Frontend [FE] Markdown links in Assistant occasionally render incorrect link text
2018758 Tabs [Tab Groups] Display a confirmation dialog when closing the last tab of a tab group
2020765 Networking Make nsIURI.rs usable in rust
2022343 Disability Access APIs Add test for MacOS native popup a11y
2025802 Machine Learning: Frontend Replace notification_emails in browser/components/aiwindow/metrics.yaml with team email
2029226 Tabs [Tab Groups] Add Glean telemetry probe for tabs_tray.tab_group_closed, tab_group_screen_opened, and drag and drop
2030052 Privacy: Anti-Tracking Update Anti Tracking Database to Ingest Real Time Tracking Data
2030181 Tabs Tab Search - clean up feature flags and booleans
2031427 Add-Ons: Extensions API [TSF] Mail compose box rejects input from IME on initial focus when messenger.compose.setComposeDetails is called.
2031661 Source Code Analysis Add a clang plugin to check RefPtr/nsCOMPtr cycle collection
2032601 General Enable os_integration tests for macOS15
2032951 General Test coverage for canvas tainting and MV3
2033423 JavaScript Engine Assertion failure: isThrowingOutOfMemory() @ JSContext.cpp:736
2033440 Settings UI Security warnings reset button text wraps
2033458 Audio/Video: Playback Crash in [@ java.lang.ArrayIndexOutOfBoundsException: at androidx.media3.exoplayer.trackselection.BaseTrackSelection.isTrackExcluded(BaseTrackSelection.java)]
2033939 WebRTC Improve videoconduit logging
2034125 Machine Learning: Frontend Add confirmation UI to the custom model settings Save button
2034228 Browser Engine [Shake to Summarize] fix S2S bottom sheet inset coloring
2034621 IP Protection IP Protection: the proxy should be on pause while renewing the token
2035693 New Tab Page Sports widget - Add schedule states for matches
2035808 Release Requests Create partner-attributed softonic-014 builds
2036005 Networking Show TLS error code on the "Secure Connection Failed" error page
2036132 Settings UI "Zoom text only" warning message does not match Figma specifications
2036453 Task Configuration Intermittent symbols [taskcluster:error] exit status 1 | single tracking bug
2036714 General Port onLoad module initialization to use category-manager invocation
2036874 Disability Access APIs macOS VO fails to announce VPN panel
2036915 Mozbase Parse common log line patterns from test process output into typed resource-monitor markers
2037007 Graphics: WebRender Support non-premultiplied images in the quad_textured shader
2037058 Messaging System Wrong second message to handleAction from browser-siteProtections.js
2037185 Bookmarks Add telemetry events for bookmarks import
2037226 UI Widgets moz-page-nav updateNavButtonsState is not currently setting selected attribute to false on hidden moz-page-nav-button which was previously selected
2037328 Netmonitor 100.94 - 71.84% damp custom.netmonitor.exportHar + 5 more (Linux, OSX, Windows) regression on Thu April 30 2026
2037364 IP Protection When using the new VPN and DoH with Maximum Protection i cant get any dns resolved and so i cant go to any website.
2037368 Graphics: WebRender Support tiled images with the quad shader code path
2037372 DOM: Core & HTML Cannot escape keyboard-locked fullscreen with Escape key if keyboard repeat is disabled
2037462 Mochitest Perma [tier2] runtests.py | Timed out while waiting for server startup.
2037597 web-platform-tests firefox.py: certutil option isn't taken into account if certutil is present on the build directory
2037646 New Tab Page List Widget fixes/Cleanup
2037660 Settings UI Prepare performance tests for the SRD pref flip
2037688 Layout: Form Controls Date picker spinner UX is confusing and selects invalid dates when min/max values provided
2037690 Messaging System Update browser_asrouter_newtab_multistage_messages test so that it runs on 151+.
2037696 New Tab Page Sports widget - Add /matches and /teams Merino endpoints
2037698 Graphics Netflix video is magenta and white when using WebRender (Software D3D11)
2037731 DOM: UI Events & Focus Handling suspicious double assignment in TextInputHandler::HandleKeyDownEvent
2037745 CSS Parsing and Computation Reduce sizes of specified numeric types with calc() variants
2037831 UI Tests Fix disabled onboarding UI test after reverting the change made to canShowNotificationPage
2037887 Privacy Use the Gecko data for blocked trackers in the blocked trackers pill from home
2037942 Search Fix stylelint-plugin-mozilla/use-design-tokens violations in browser/components/search/content/addEngine.css
2037966 Mochitest Surface LSan leak markers from mochitest jobs in resource usage profiles
2037970 Tabs 6.73 - 5.01% baseline-profile:fenix switchTabsAnimationOn.frame_counts.minimum + 2 more (Android) regression on Thu April 23 2026
2038035 Machine Learning: General Preserve loading state during long-running tool execution
2038186 web-platform-tests Update web-platform-tests to e07b6b071ab973c479ef016dc64044ccbfa51238
2038281 General Migrate Windows AArch64 profile generation from win11 24h2 to win11 25h2
2038348 Contextual AI Add logging to the summarization middleware
2038350 Onboarding Revert to separate install referrer service for prefetching
2038355 General Fix invalid BUG_COMPONENTs
2038367 Contextual AI disambiguate integrity verification errors
2038368 Contextual AI disambiguate errors in MLPA streaming responses
2038400 Privacy Drop usage of layer2 color in TrackersBlockedCard
2038401 Tabs Replace Acorn color token usage in TabGroupColorPickerItem with M3 color tokens
2038426 Shell Integration Perma mingw [tier 2] ld.lld: error: undefined symbol: IsCurrentAppPinnedToTaskbarWin11() | single tracking bug
2038484 Tabs Remove unused InactiveTabs
2038531 Tooling Update Kotlin Coroutines to version 1.11.0
2038533 WebRTC Crash in DataChannel::AnnounceClosed
2038545 CSS Parsing and Computation Testcase redefining N CSS variables is 650x slower than creating them, and 100x slower than Chrome.
2038611 Toolchains Build fails with `mach taskgraph failed in toolchain.py (exit 1)` on ja locale
2038629 Console [devtools-toolbox-crash] component error: TypeError in EvaluationContextSelector
2038733 Disability Access APIs Use MakeRefPtr to replace "RefPtr<T> foo = new T()", in `accessible/`
2038735 Tooling Update the OSS Licenses Gradle Plugin to version 0.12.0
2038736 Push Update Firebase Cloud Messaging to version 25.0.2
2038737 Tooling Update Google Play Services FIDO to version 21.3.0
2038738 Browser Engine Update ML Kit GenAI Prompt API to version 1.0.0-beta2
2038776 Experimentation and Telemetry Add glean events that track Adjust conversion events
2038798 Graphics: WebRender Fix wrench png
2038845 PDF Viewer Update PDF.js to new version 6bbcb46db888aa9eea4bb4d4bbe6695b9b601773 from 2026-05-11 18:20:05
2038870 General Vendor application-services revision 8e3dd10
2038877 Layout: Scrolling and Overflow Let ::-webkit-scrollbar ride on trains
2038907 Graphics: Canvas2D land test for bug 2022610
2038910 Graphics: ImageLib land test for bug 2022252
2038935 Shared Components Release a new version of devtools-reps on npm (0.27.7)
2038938 UI Tests Match manual tests with automated UI tests by adding missing TestRail links
2038948 Translations Fix typo in ID name about-translations-swap-langauges-icon in about-translations.html
680808 Widget: Cocoa application crashes when clicking on special mac menu item
733425 Widget: Cocoa Why is gConstructingMenu global instead of a member variable
1567317 CSS Parsing and Computation Add a test for bug 1541861 by checking `CSSStyleSheet.deleteRule()`'s error messages.
1745823 General Implement negative permissions
1793908 Graphics Add HDR metadata for playing HDR through video overlay on Windows
1803078 Audio/Video: Playback Is it possible to display mpris metadata in private browsing
1952657 General abseil-cpp tries to include non-existent "execinfo.h" header on musl+loongarch64/armv7
1996710 Disability Access APIs Call UAZoomChangeFocus when text selection or focused accessible bounds change
2011485 Screenshots Screenshots overlay visible on both splitview browsers
2015587 Data Loss Prevention Intermittent toolkit/components/contentanalysis/tests/browser/browser_clipboard_paste_chat_shortcuts.js | single tracking bug
2017152 Performance Move sp3 tests to LT
2019067 Sidebar Zoom level of devtools can affect expand on hover rect for vertical tabs
2020394 Privacy: Anti-Tracking Clarify private browsing table cells that inherit from normal mode
2024341 CSS Parsing and Computation Make the new attr() work with pseudos
2025501 Performance Expand performance test documation, providing examples
2030402 WebRTC Perma /webrtc/simulcast/h264.https.html | H264 simulcast setup with two streams - Test timed out
2030894 Security browser.xul.error_pages.expert_bad_cert is no expert at all in the new felt privacy error page
2031328 Tabbed Browser tab-preview-panel emits unpaired popupshown/popuphidden events, breaking sidebar autohide
2032643 Messaging System Enable new splash screen for Windows full installs, Microsoft Store (MSIX) installs
2034669 Application Update Give a grace period after waking from sleep before enforcing compulsory restart
2035195 Widget: Cocoa Migrate the system print dialog off runModal and remove nsCocoaUtils::PrepareForNativeAppModalDialog
2035241 Machine Learning: General Telemetry: Chat Assistant add non-200 MLPA response code
2035340 Machine Learning: Frontend Add ToolCall rendering container in AI Window
2035367 Settings UI Split up languages Settings tests and move to lanugages sub-folder
2035874 Share Share multiple links from share sheet
2036215 Graphics: ImageLib Change NewClonedProxy to return already_AddRefed type
2036427 Nimbus Desktop Client RemoteSettingsExperimentLoader.onEnabledPrefChange can re-call enable()
2036832 Toolbar Remove `BrowserToolbarInteractor/Controller/MenuController` from `BaseBrowserFragment`
2036833 Toolbar Cleanup for `SearchSelectorToolbarAction, ToolbarView, IncreasedTapAreaActionDecorator` and their tests
2036860 Nimbus Desktop Client NimbusTestUtils.factories.recipe should provide defaults for Firefox Labs fields when isFirefoxLabsOptIn = true
2037014 Networking 2.89% Heap Unclassified (OSX) regression on Sun April 26 2026
2037081 Networking Remove unused mirroring for more necko probes
2037130 Task Configuration Update taskgraph to version 23.0.0 and mozilla-taskgraph to v4.1.2
2037251 Themes `--link-color-visited` does not use VisitedText in HCM
2037404 IP Protection Bandwidth infobar is not dismissed at panel open in new window
2037529 Machine Learning: Frontend [a11y] Smart window chat browser - focus becomes invisible/lost when moving from "new chat" button
2037541 New Tab Page Newtab nova widgets context menu needs a manage widgets option
2037658 Settings UI Prepare moreFromMozilla tests for the SRD pref flip
2037990 Toolbar Rename all references to `BrowserToolbarView` to `BrowserToolbar` like variable names and documentation
2038062 JavaScript Engine: JIT Add a JS ABIs SMDOC comment
2038086 Downloads Remove unneeded fragment_downloads.xml
2038088 Browser Engine Inline ComposeView in DohSettingsFragment and remove fragment_doh_settings.xml
2038090 Search Inline ComposeView in SearchShortcutsFragment and remove fragment_search_shortcuts.xml
2038097 Shell Integration Decouple default Windows launch-on-login from stub-installer first-startup path
2038125 JavaScript Engine Consider making JSClassOps uses more conscise with designated initializer lists
2038149 CSS Parsing and Computation https://shitposter.world/main/public errors because they check `CSS.supports("::-webkit-scrollbar")` then call insertRule("::-webkit-scrollbar-button:disabled")
2038254 Performance: General Delay load some DLLs that are not typically used in child processes.
2038313 Audio/Video: Playback Make WebAudio and WebSpeech involves in audio focus management
2038317 Translations Make translations tests pass with SRD enabled
2038342 Machine Learning: On Device "Manage On-Device AI Models" shows multiple version of mobilebert-query-intent-detection
2038402 Browser Engine Align text colors of ModelInformation and DisclaimerMessage with Figma
2038407 Browser Engine Use LinkText component in LearnMoreLinkText
2038454 Onboarding Create a temporary Nimbus flag to disable Marketing onboarding card
2038472 Privacy Use M3 color tokens in IPProtectionPreference BetaBadge
2038527 AI for Development Add a skill for splitting / reorganizing patches for review
2038637 IP Protection [l10n] Link in the VPN Get Started panel displays on two rows causing UI issues in French locale
2038723 Layout Use MakeRefPtr to replace "RefPtr<T> foo = new T()", in layout
2038769 Crash Reporting Spike in "no url available..." errors when submitting crash reports
2038789 General Move build system logic out of make
2038802 Graphics: ImageLib Use MakeRefPtr to replace "RefPtr<T> foo = new T()", in image/
2038805 Shell Integration Add telemetry to check if IOpenWithLauncher works as expected
2038873 DOM: Security [wpt-sync] Sync PR 59809 - Increase test coverage for nonce-hiding.
2038874 Toolbar Clean up toolbar redesign feature flags and settings
2038883 Share Handle entry points to the native share sheet
2038888 Share Remove onDismiss callback and menu handling from ShareSheetLauncher
2038894 General BuildCache isn't considered when getting compiler args in ClangdBackend
2038898 JavaScript: GC Crash in [@ mozilla::Variant<T>::as<T> | js::GCMarker::matchRegularOrParallelTracer<T>(TraceEdgeForBarrier(js::GCMarker*, js::gc::TenuredCell*, JS::TraceKind)::$::operator()<T>(JSObject*) const::{lambda(auto:1&)#1})]
2038906 Graphics: WebRender Disable WebGL overlay when RenderDXGITextureHost::GetDCompositionTexture() is slow
2038919 DOM: Core & HTML Add UseCounter for point lock with unadjustedMovemet
2038921 Lint and Formatting node-licenses fails with UnicodeDecodeError on Windows ja locale
2038937 CSS Parsing and Computation Update CSS use counter metrics for bug 2035572
2038947 JavaScript Engine: JIT Remove JS_CODEGEN_RISCV32 ifdefs
2038968 JavaScript Engine: JIT Clean-up simulator ifdefs and includes
2038976 CSS Parsing and Computation Move immutable flag from DeclarationBlock to Rust.
2038984 New Tab Page Newtab move widget strings
2038992 General Update android nightly application-services version bump to new version 41db6a8f18d5b66af57c02aa82aa30e219333b4e from 2026-05-12 13:19:00
2039008 IP Protection Enable IP-Protection FxA Activate Auth flow by default
2039010 web-platform-tests Update web-platform-tests to 5e6b5dd26cb9f067b38d86038e6f01fe04e82845
2039028 IP Protection Introduce upgradeNotAvailable pref to gate upgrade buttons and messaging
2039029 Layout: Scrolling and Overflow Use `MakeUnique` to allocate ScrollMetadata
2039030 JavaScript Engine: JIT Remove unused code and replace macros in the riscv64 simulator
2039032 Experimentation and Telemetry Don't send the Adjust ping when recording conversion events
2039040 General Document all UndocumentedPublicClass and UndocumentedPublicFunction from detekt baseline
2039058 Machine Learning: General Enable World Cup tool call by default for Smart Window
2039102 DOM: Core & HTML Remove some unused deprecated ops.
2039103 New Tab Page Newtab widgets add string for add widget button
2039107 New Tab Page Sports widget - Fix failing test in main by updating referenced l10n string
2039120 PDF Viewer Update PDF.js to new version 7f151c777b5c076828375710da39c516493b35ec from 2026-05-12 20:37:31
401380 Widget: Cocoa Images dragged to desktop don't land where you drop them, move folders
1608834 Task Configuration Enable chunking in the taskgraph for all mochitest suites
1756564 Downloads Panel PDF download new tab steals focus even if user switches to a different tab between download start and download end
1782541 Graphics In headless mode, the RefreshDriver keeps ticking forever "waiting for paint" in the WebExtension process
1926361 Audio/Video Potential memory leak in WebM Fuzzer
1959800 Accounts and Sync Rename onPictureInPictureModeChanged to onPictureInPictureModeEnabled
1966451 DOM: Performance APIs Intermittent /resource-timing/test_resource_timing.https.html | single tracking bug
1987208 Performance False-positive memory leak from WindowRecomposerPolicy.factory in Compose UI tests
2012213 General Allow option to hide the checkmark icon in Confirmation Hints
2017274 Networking Intermittent netwerk/test/unit/test_http3_alt_svc.js | single tracking bug
2017940 Layout Align selection height to text height in vertical mode
2019873 General Stack traces for "out of memory" toolbox crashes are missing
2021067 Agent Buffer logs during wdspec tests and flush only on test failure
2023908 Address Bar Intermittent browser/components/urlbar/tests/browser-updateResults/browser_suggestedIndex<something> | single tracking bug
2024787 Tabs [Tab Group Creation] Set a character limit for the tab group title
2026272 Tabs [Tab Groups] Add the selection state to the TabGroups list item
2026671 Settings UI Learn more link is missing from DNS over HTTPS section
2029541 Bookmarks & History Intermittent browser/components/places/tests/browser/browser_bookmark_context_menu_contents.js | single tracking bug
2031356 Lint and Formatting Fix a ruff warning in intl/unicharutil/util/base_chars.py
2031371 Lint and Formatting Fix a clippy warning in toolkit/components/glean/src/init/viaduct_uploader.rs
2031377 Lint and Formatting Fix a clippy warning in toolkit/components/gecko-trace/src/collector.rs
2032168 Messaging System Intermittent browser/components/aboutwelcome/tests/browser/browser_aboutwelcome_attribution.js | single tracking bug
2032501 JavaScript: WebAssembly Cache and re-use ContStack
2033091 Nimbus Desktop Client forceEnroll API should take branch slug, not branch object
2033393 General Upgrade dependencies for http (1.4.0), hyper (1.9/0), and warp (0.4.2) [including lots of required sub-dependencies]
2035784 Privacy: Anti-Tracking More strongly type StorageAccessPermissionGrantPromise
2035991 Onboarding Show RTAMO download dialog after onboarding
2036069 Release Automation enable update integrity tests for release
2036095 Address Bar Move SearchModeSwitcher out of system modules
2036135 Settings UI possible improvements for new "More from Mozilla" settings page
2036472 Contextual AI Settings aren't always persisted when changed from sheet
2036650 Privacy [IPProtection] Wire up fenix to toolkit proxy
2036813 Onboarding Ensure the new download RTAMO addon dialog shows up for at least 1500ms
2036849 JavaScript Engine Cleanup the accessors and flags about cached stencil LoadedScript and ScriptLoadRequest
2037117 Sidebar Updated bookmarks panel does not have multiselect context menu
2037119 Networking: HTTP Crash in [@ mozilla::net::nsHttpConnectionMgr::CheckTransInPendingQueue]
2037133 Settings UI DNS over HTTPS settings incorrectly shows an error
2037301 New Tab Page Sports widget - Add key dates state
2037428 Settings UI History search l10n ids were not updated
2037446 CSS Parsing and Computation Implement initial support for CSSNumericValue reification of <angle> values
2037513 Machine Learning: On Device Update the Firefox AI Runtime docs
2037644 SQLite and Embedded Database Bindings Stop using finalize return value as it doesn't represent the result of finalizing a statement
2037665 Settings UI Prepare siteData tests for the SRD pref flip
2037779 Audio/Video: Playback [HDR] Allow offscreen rendering to layers
2037799 Tooling Wire up the longfox entry point to the trackers blocked card
2037805 General Intermittent devtools/client/application/test/browser/browser_application_panel_session-history.js | "title" == "https://example.com/browser/devtools/client/application/test/browser/resources/session-history/index_with_title.html"
2037833 Privacy Remove the email mask secret setting from the secret settings preferences xml
2037892 UI Tests Migrate SettingsHTTPSOnlyMode to the efficiency framework
2037894 Settings UI “Zoom text only” state from about:preferences is not reflected in View → Zoom menu
2037933 Address Bar Reusing all urlbar result rows from the last query doesn't work
2038143 UI Tests Intermittent UI test failure - < AddressAutofillTest.verifyAddAddressViewTest >
2038177 Messaging System Respect Fullscreen State in Background Toast Notifications
2038227 Machine Learning: Frontend Perma browser/base/content/test/static/browser_parsable_css.js | checkAllTheCSS - Got error message for chrome://browser/content/aiwindow/components/ai-website-confirmation.css: Unknown pseudo-class or pseudo-e when Gecko 152 merges to beta on 2026-05-18
2038231 Networking: HTTP Assertion failure: false (MOZ_ASSERT_UNREACHABLE: Shoud not be called), at checkouts/gecko/netwerk/protocol/http/HappyEyeballsTransaction.cpp:109
2038250 Lint and Formatting Fork media-query-no-invalid stylelint rule to allow -moz-pref
2038339 Messaging System Expose crash data into ASRouterTargeting
2038346 Release Automation split final verify into per platform tasks
2038369 Privacy Remove the previous hidden window changes.
2038422 Layout: Text and Fonts MVS (U+180E) is rendered with zero advance in Mongolian text, even when the font's GSUB rule produces a visible mvs.narrow / mvs.wide glyph
2038664 Privacy Refactor shouldUseTrackingProtectionDatabase to guard only the tracking protection dashboard
2038694 JavaScript Engine Split ModuleScript and LoadedScript
2038730 Graphics: WebRender Frequently triggering multiple release assertions
2038782 UI Tests Create new high priority UI test for Add search widget
2038812 Performance User requested deliberate app relaunces resulting in session restore are included the tab_reloaded metric
2038826 Developer Environment Integration Consider disabling clangd background indexing by default.
2038934 Networking: DNS TRRServiceChannel should set Proxy-Authorization from nsIProxyInfo::ProxyAuthorizationHeader when present
2038942 Bootstrap Configuration Fix macOS bootstrap
2039002 Task Configuration add more perf metric to decision task
2039060 DOM: Device Interfaces Add more log messages for WebSerial figuring out what ports are available
2039069 Messaging System Perma [tier 2] browser/components/asrouter/tests/browser/browser_asrouter_newtab_messages.js | test_click_newtab_message - The test message had a click recorded for it. - true == true
2039083 Bookmarks Remove CoroutineScopeExt.kt in storage-sync
2039085 Networking: HTTP --use-http2-server mochitests leak under ASAN
2039096 Audio/Video Update media-preset to focus primarily on media-related tests in order to reduce CI resource usage.
2039099 Firefox Source Docs: Content refresh the list of projects in https://firefox-source-docs.mozilla.org/contributing/contributing_to_mozilla.html
2039119 WebRTC: Audio/Video Intermittent dom/media/webrtc/tests/crashtests/1903905.html | single tracking bug
2039127 Storage: IndexedDB Build error - "ActorsChild.cpp(1800,19): error: Refcounted variable 'database' of type 'IDBDatabase' cannot be captured by a lambda" with VS2026 18.6
2039178 General Update android nightly application-services version bump to new version 06c391e81c367d1059d601c812f379875d7ef0a3 from 2026-05-13 05:02:54
2039216 Theme Support increased contrast mode in About dialog
2039238 MFBT Mark all classes with multiple empty bases as MOZ_EMPTY_BASES
2039245 UI Tests Migrate verifySyncedTabsWhenUserIsNotSignedInTest to the efficiency framework
2039254 JavaScript: WebAssembly Perma /wasm/webapi/esm-integration/reuse-wasm-loaded-as-classic-script.tentative.html | Reuse Wasm loaded as classic script - Test timed out - when Gecko 152 merges to beta on 2026-05-18
2039261 Lint and Formatting Perma [tier 2] mozlint.errors.LintException: mozcheck binary is unavailable: could not locate a prebuilt binary (MOZ_FETCHES_DIR/mozcheck) and the source build failed. Ensure the linter task fetches the linux64-mozcheck toolchain, or that cargo is availab
2039270 Performance Auto-detect the VS toolchain in build-custom-car.sh
2039283 Release Automation final verify should use a treeherder-recognized failure message
2039309 Audio/Video: Playback dom/media/platforms/ffmpeg/FFmpegVulkanVideoDecoder.cpp:481:26: error: major was not declared in this scope
2039323 Performance: General Create claudometer try push preset
2039325 CSS Parsing and Computation Allow style sharing across shadow roots.
2039327 CSS Parsing and Computation Avoid computing animation values in ShouldTransition.
2039333 New Tab Page Update locales for Firefox 151 train-hop
2039336 Settings Move Firefox-owned features to top of AI controls settings page
2039349 IP Protection Correct image sizing for promo in about:settings#privacy built-in VPN section
1455294 Inspector Add an option to toggle HTML comments in the inspector
1741221 Enterprise Policies ManagedBookmarks policy can't make use of favicons if SanitizeOnShutdown policy deletes history
1822189 Graphics: WebRender filter: drop-shadow() causes image stretching and shadow clipping
1880436 Layout: Scrolling and Overflow New wpt failures in /css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/prefer-inner-target.html
1889639 Graphics: WebGPU Disable WebGPU on 32-bit targets
1941642 General add wayland 24.04 snap tests to os_integration
1948169 Messaging System [FxMS Docs] Note legal approval for topFrecentSites
1961268 Messaging System Refactor ASRouter experiment provider to handle coenrolling nimbus features
1996422 General Enable QR code sharing on Windows and Linux (only Nightly for now)
2001442 Settings UI Handle old preferences links in new format
2008960 Security: Process Sandboxing Remove pref for MITIGATION_EXTENSION_POINT_DISABLE in Windows GPU process sandbox
2014781 Memory Allocator ~1% regression on Apple Silicon since using 4KiB logical memory pages
2015559 General Enable executeScript restriction on extension pages on all channels
2018362 Geolocation Provider [meta] Reduce GLS fallback on Mac
2018752 Menus Add a "Set as default browser" menu item to Mac application menu
2019113 Web Apps Support Taskbar Tabs in Flatpak installations
2019378 WebRTC Correct RTCSctpTransport-maxChannels.html
2019482 Layout: Scrolling and Overflow Failure in /css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/prefer-focused-nested-containers.html
2026252 Tabbed Browser Container tabs are shown incorrectly when Nova design tokens are enabled
2027015 WebRTC: Signaling Sdp const correctness check and linting check
2028705 Networking: DNS Server Not Found message links to www version of the site on the "Learn More" link
2032215 Alerts Service gDialogBox should be passing dialogOptions to the SubDialog constructor, not options
2033130 CSS Transitions and Animations Rework KeyframesStep and generate Gecko Keyframes to include timeline range name
2033545 Search Fix several documentation issues in browser/components/search
2033819 Messaging System Multi-site Taskbar Tabs Pinning Component (Frontend experience)
2033852 Raptor Archive Speedometer 3's per-suite Simpleperf Profiles
2033895 Sharing Disable sharing UI in private browsing mode and containers
2034406 Printing: Output [skpdf] PDFs generated from pdf.js (via MozPrintCallback) are missing selectable text
2034596 Form Autofill Update styles for address doorhanger
2034882 Machine Learning: General [Models] Upgrade SmartWindow Gemini 2.5 Flash Lite to 3.1 Flash Lite
2034919 Remote Settings Enable remote-settings v2 support in android
2035084 Bookmarks & History Edit bookmarks panel shows "mobile" instead of "Mobile Bookmarks"
2035506 Messaging System about:welcome first screen onboarding impression ping is dropped
2035824 Experimentation and Telemetry [UI] Share feedback link
2035878 Search Investigate removing loading add-ons from resource://search-extensions/
2036073 Firefox Monitor Add new pref to enable/disable privacy panel setting
2036142 Tabs [Tab Group UI] Update the selected state for tab group
2036258 CSS Parsing and Computation Hit MOZ_CRASH(assertion failed: value >= 0. && value <= 1.) at servo/components/style/stylesheets/keyframes_rule.rs:128
2036433 Nimbus Desktop Client forceEnroll does not support co-enrollment
2036470 Panning and Zooming Use IPDL refcounted actors for APZ
2036520 Profile Backup High frequency browser/components/backup/tests/browser/browser_settings_restore_from_backup.js | test_restore_in_progress - Confirm button should be disabled. - false == true | single tracking bug
2036568 Security: PSM Add browser-chrome test coverage for protectedAuth.xhtml
2036608 Widget: Cocoa Copy and paste doesn't work in Finder dialogs
2037143 New Tab Page about:preferences throws errors after removal of backward-compat shim
2037637 Settings UI Prepare credential management tests for the SRD pref flip
2037638 Settings UI Prepare downloads tests for the SRD pref flip
2037655 Settings UI Prepare experimental features tests for the SRD pref flip
2037661 Settings UI Prepare permissions tests for the SRD pref flip
2037947 New Tab Page Newtab widget base component
2037992 Settings UI Securirty Privacy settings card linkbox goes to the wrong place
2037994 Settings UI Security warnings reset button purpose could be clarified
2038049 Audio/Video: Playback BenchmarkPromise resolves before decoder shutdown in MediaWebM fuzz harness
2038087 WebExtensions Remove unneeded fragment_add_on_permissions.xml
2038176 Settings UI Searching for the `Applications` string without loading the Downloads page first will not show the Content Types and Actions from the table
2038222 Settings UI 'Reload all tabs' button is not triggered after switching the ETP from Standard to Strict
2038324 Settings UI Make external tests pass with SRD enabled
2038370 Machine Learning: Frontend smartbar suggestions stop showing when suggesting an open tab
2038478 Panning and Zooming Update the new snap target ids properly even if the destination is unchanged in SmoothScrollTo
2038480 Panning and Zooming Avoid calling `SetDelayedTransformEnd(false)` in ScrollSnapToDestination if the snap destination will not be changed
2038528 Interventions Add ability to specify webcompat CSS interventions right in the JSON files.
2038557 JavaScript Engine Remove reservedSlots pointer from proxy objects
2038751 Tabs [Tab Groups] Fix the drag and drop feature flag and formally enable the code path in Nightly
2038918 Gecko Profiler error: could not compile `gecko-profiler` (lib) due to 1 previous error
2038924 Tooling Migrate assertNotNull usages to kotlin-test
2039080 IP Protection [a11y] Add aria-label to VPN panel header for macOS VO
2039106 Tooling Update Gradle to version 9.5.1
2039136 General Vendor application-services revision 06c391e
2039139 Graphics: WebRender Anchor text-run interning on the run pen origin
2039207 UI Tests Migrate verifyJumpBackInSectionTest to the efficiency framework
2039214 DOM: Animation Update AnimationEffect::IsCurrent to reflect a scroll timeline specific spce change
2039232 Logins Create a feature flag for importing passwords
2039234 Privacy Use assertIs in ipprotection site info icon tests
2039300 Agent Enable dynamic chunks for wdspec tests
2039346 New Tab Page World Clock city search bug
2039354 Privacy Remove TrackingProtection pill secret setting and enable by default in nimbus
2039358 New Tab Page Add empty World Clock search results state
2039359 Sync Add strings for send tab menu label updates
2039361 Networking Update neqo to v0.28.0
2039372 General FIx all NoSystemCurrentTimeMillis and HardcodedPaddingUsage from detekt baseline
2039382 Tooling Update KSP to version 2.3.8
2039413 General [DevTools Release Tasks - Cycle 152] Update MDN compat data
2039421 Graphics: WebRender [rustc-1.92] error: value assigned to `built_frame` is never read
2039445 Performance Prewarm shared preference to decrease first shared preference access time
2039462 Networking Mark nsINetUtil as builtinclass
2039463 Graphics: CanvasWebGL gfx/gl/GLContext.h:1371:14: runtime error: call to function glGetString through pointer to incorrect function type 'unsigned char *(*)(unsigned int)' gfx/angle/checkout/src/libGLESv2/libGLESv2_autogen.cpp:456
2039470 Graphics Prevent to disable video overlay if video is HDR even with slow present
2039471 DOM: Core & HTML AssertedCast error: Cannot cast -32769 from int32_t to uint32_t: out of range [@ mozilla::dom::HTMLSelectElement::GetCurrentOption]
2039477 New Tab Page Manually bump the minor version number of New tab from 152.1.0 to 152.2.0
2039518 Graphics: WebGPU [Linux][X11] Load dmabuf modifiers from EGL
2039555 Networking: HTTP Enable Happy Eyeballs on nightly
2039626 XPCOM Consider enabling thread-local arenas on the main thread.
2039632 DOM: Events optimize out one extra Addref/Release from event dispatch
2039634 Settings UI TV browser/components/preferences/tests/downloads/browser_downloads.js | testSelectDownloadDir - browser.ui.interaction.preferences_paneGeneral['chooseFolder'] must contain the expected value - 3 == 1
2039664 Settings UI Update strings for browser layout in about:preferences
2039665 IP Protection Add "unavailable" string for 152
2039695 DOM: Core & HTML Remove unused nsAttrValue::eImage.
1478626 Keyboard Navigation Remove unused Browser:NextTab and Browser:PrevTab commands
1824875 CSS Transitions and Animations Support Named Timeline Ranges for keyframe selectors
1854862 Widget: Cocoa CSS hover flickers when Firefox windows are open on 2 separate macOS Spaces (virtual desktops)
1904613 Search Remove the old application provided WebExtension based search engines from the source code
1925684 Widget: Gtk Crash in [@ mozilla::widget::WlCompositorCrashHandler]
1932088 Widget: Win32 Crash in [@ mozilla::CollectSingleStepData<T>]
1938142 Address Bar Intermittent browser/components/urlbar/tests/browser/browser_searchMode_excludeResults.js | single tracking bug
1967279 Machine Learning: On Device replace `wllamapreview` with `link-preview`
1971091 Address Bar High-freq browser/components/urlbar/tests/quicksuggest/browser/browser_telemetry_suggestMetrics.js | single tracking bug
1979462 Web Apps Use the icons from a Web app manifest within Taskbar Tabs
2009556 Toolchains Perma make[1]: *** [Makefile:680: check-symbols] Error 1 | wasm32-wasi/predefined-macros.txt
2014571 DOM: Device Interfaces Add telemetry for site permission requested by suspicious sites
2019152 Address Bar Update the urlbar input border and edges for Nova
2019501 Toolchains Perma toolchain [taskcluster:error] exit status 1 | Error response from daemon: Could not find the file | single tracking bug
2023767 Machine Learning: Frontend Nova window switcher UI updates
2026324 Settings UI New Tab Homepage settings don't reflect extensions when settings-redesign is enabled.
2026972 Startup and Profile System Track the source of new profiles in telemetry
2028605 General Refresh the UX for the Report Broken Site feature
2031715 Tabs [Tab Groups Drag and Drop] Hide focus state from the TabsTray when a tab is being dragged
2031786 Machine Learning: Frontend Normalize follow-up strings (punctuation + whitespace)
2032668 Design System and Theming Migrate illustrations and non-Acorn icons out of ui-icons
2033163 DOM: Device Interfaces Remove system ports from WebSerial port list on macOS
2033592 New Tab Page Fix List widget "Create a new List" too eagerly bug
2033932 Protections UI Update browser_ext_commands_execute_page_action.js to work with trustPanel enabled
2034441 Widget: Cocoa Frequent widget/tests/test_native_key_bindings_mac.html | single tracking bug
2034851 DOM: UI Events & Focus Handling Sequential focus navigation starting point should be separate from selection
2034893 Disability Access APIs Fix intermittent failure in test_takeFocus.xhtml
2035558 Messaging System Add pause/play button for about:welcome animated backgrounds
2035568 Messaging System Add animated illustrations for about:welcome screens
2035631 DOM: Web Authentication Remove mostly unused copy of pkijs from WebAuthn tests
2035785 Homepage Crash in [@ java.lang.IllegalStateException: at androidx.fragment.app.Fragment.requireContext(Fragment.java)]
2035834 Disability Access APIs Figure out a solution for the static_casts in DocAccessibleChild::SerializeAcc
2035922 Messaging System Feature callout content has incorrect border radius in HCM mixed themes on Mac
2036234 Gecko Profiler Use pthread API to retrieve stack top on non-Android Linux
2036417 Machine Learning: Frontend Promo Card for setting SW as Default
2036515 WebRTC Fix numerous spelling errors in comments
2036676 Geolocation Provider Compiling on Windows broken with --disable-necko-wifi set
2036805 CSS Parsing and Computation [css-custom-properties] <image> syntax shouldn't support `none` (was: New wpt failures in /css/css-properties-values-api/register-property-syntax-parsing.html)
2036873 Machine Learning: General Memories quality improvements - prompt improvement
2036999 General Add proper flags to each assembly files that depend on C preprocessor
2037220 Machine Learning: Frontend Set as Default Onboarding Card
2037666 Settings UI Prepare telemetry tests for the SRD pref flip
2037773 Settings UI Page not found for 'Learn more' link from the 'Automatically send crash reports' checkbox
2037794 Site Reports slack.com cursor disappears when pasting sharing images
2037943 Crash Reporting Rename the CrashID annotation to CrashEventID
2038151 Settings UI Manage Topics and Choose a Wallpaper options are enabled in about:settings#home with Custom Urls and Blank pages set
2038187 Startup and Profile System Record parsing errors from profiles.ini
2038215 Mach Vendor & Updatebot mach vendor rust now removes some .gitignore files and changes checksum files
2038259 Profile Backup Add scheduler_toggle_source Glean metric to attribute Firefox Backup toggles to their source UI or message
2038740 SVG SVG tspan.getNumberOfChars() returns wrong number for bidi text (mixed ltr/rtl)
2038759 Settings UI Unable to change panes with the keyboard when on a sub-pane
2038879 Toolchains Perma [clang-trunk-stage1] 1 out of 1 hunk FAILED -- saving rejects to file clang/lib/AST/ItaniumMangle.cpp.rej | [taskcluster:error] exit status 1 | single tracking bug
2039000 Task Configuration Enable chunking in the taskgraph for most remaining reftest suites
2039048 Sync Update strings for the signed-out, sync disabled, and single-device flows flows of the send tab context menus
2039111 Privacy [IPProtection] Play toolbar animation once per activation/foreground session
2039112 Contextual AI improve content extraction error handling
2039221 DOM: Service Workers Remove InternalRequest::SnapshotUnfilteredHeaders();
2039239 Machine Learning: Frontend Enable browser.smartwindow.allowTables by default in Smart Window
2039316 CSS Parsing and Computation [css-attr] Fix test failure with test_garbage_at_end_of_declarations.html
2039319 CSS Parsing and Computation [css-attr] Fix test failure with attr-case-sensitivity-003.html
2039331 Tooling Update Material Components to version 1.14.0
2039337 Contextual AI centralize error pathways in S2S.
2039355 SVG SVG getBBox return values are scaled by CSS 'zoom' but should not be
2039381 Networking: HTTP Update neqo_glue and prefs to activate new neqo v0.28.0 features and telemetry
2039406 General Unified build relative paths are not linkable in vscode output
2039447 General Builds on automation must use a version of rust for which we know how to hook OOM: want < 1.92.0-alpha, have 1.92.0
2039448 DOM: Service Workers Frequent backlog /service-workers/service-worker/same-site-cookies.https.html | same-origin, form post with change-request, cross-site redirect, and same-origin redirect - expected NOTRUN | single tracking bug
2039449 General Always centre logo in QR codes
2039455 Tabbed Browser: Tab Groups Selected tab missing shadow with Nova theme disabled after bug 2023692
2039459 Toolchains Patch from bug 2037587 missing in clang 21
2039534 Places Remove or shorten some unnecessary Places db transactions
2039548 Widget: Gtk [Wayland] Don't query missing monitors for async screen getter
2039607 Settings UI Perma browser/components/preferences/tests/languages/browser_browser_languages_fallback.js | when Gecko 152 switches to Beta on 2026-05-18
2039647 Search Fix FxSuggest unused expression warning surfaced by Kotlin 2.4
2039694 Graphics: Text Fix spelling of family
2039696 DOM: Core & HTML avoid calling nsNameSpaceManager::GetInstance()->GetNameSpaceURI in Element::SetAttrAndNotify when namespace is the default one, and avoid calling IsInObservedAttributeList second time
2039702 Mach Core mach emits noise on stdout at startup which breaks mcp
2039704 CSS Parsing and Computation Remove select > button UA rules
2039719 DOM: Core & HTML Avoid attribute reparsing on most cases.
2039720 JavaScript: WebAssembly WebAssembly.Suspending constructor has wrong name
2039727 Sync Update the context menu entry points in the url for signed out users
2039754 Graphics: WebGPU `canvas.getContext("webgpu")` should return null when WebGPU is not supported
2039755 PDF Viewer Update PDF.js to new version cd4fd7563c310e8625f407bb208aa19b0506b598 from 2026-05-14 20:11:06
2039761 Performance Put the A55+sp3+LT tests temporarily on a different platform
2039768 Tooling Update various Gradle dependencies
2039776 Source Documentation Change 'View page source' to link to github
2039788 General Update android nightly application-services version bump to new version 2f34dc137fd2a8edaf54352a3ed4feecb5936674 from 2026-05-15 05:02:34
2039789 JavaScript: GC Large increase in Base Content JS and Base Content Explicit AWSY measurements from bug 2004011
2039857 CSS Parsing and Computation Factor out shadow root sharing check.
2039871 Web Speech Ignore bad message data in SpeechDispatcherParent
2039896 IP Protection Fix definition of secondary button label in ipProtection.ftl
2039911 General Set as Default Browser patch broke Thunderbird build on mac.
2039942 about:logins Add between beneath login-breach-alert component
2039956 New Tab Page Update locales for Firefox 151 train-hop (Manifest 152.2.X)
2039963 New Tab Page Manually bump the minor version number of New tab from 152.2.0 to 152.3.0
2039975 DOM: Core & HTML <search> should not allow attaching shadow root
2040032 DOM: Device Interfaces reading 0xff bytes in WebSerial on Mac/Linux will be duplicated
2040061 Machine Learning: Frontend Update Set Default Promo card targeting interaction count
429952 Widget: Cocoa after resizing a window, new windows do not open with the same size and position as it.
1966844 Layout -moz-element does not work inside shadow dom / webcomponents
2006258 CSS Transitions and Animations Process stale timelines in HTML event loop
2007397 Settings UI Add test coverage to ensure removed search engines are no longer displayed in the default engines dropdown
2010859 Share Add Telemetry for Custom ChooserActions and Share Destinations
2017517 XPCOM Intermittent Assertion failure: mResponseTarget->IsOnCurrentThread(), at /builds/worker/workspace/obj-build/dist/include/mozilla/MozPromise.h:628
2018527 CSS Parsing and Computation New wpt failures in /css/css-shadow/slotted-parsing.html
2021491 Disability Access APIs crash near null in [@ mozilla::a11y::HTMLLabelIterator::Next]
2024219 Data Sanitization Missing warning icon in "new" Clear Data/History Dialog
2024509 Machine Learning: General Add Gecko Profiler markers to SmartWindow interaction lifecycle and tools
2025054 Machine Learning: Frontend Intermittent browser/components/aiwindow/ui/test/browser/browser_aichat_open_link.js | aichat container tab behavior / should open link in the container of the selected tab - Uncaught exception in test - TypeError: can't access property
2025893 Sharing Implement telemetry for modal and creation flow
2025995 Sharing Account for too many links error in desktop modal
2028609 Settings UI Enable the Settings Redesign by default
2030204 Graphics: Color Management [HDR/Windows] Make DeviceManagerDx::GetOutputFromMonitor check all adapters, to fix problems with capability detection.
2030474 Tabs [Tab Groups] Open an expanded tab group to the selected tab/active tab
2031862 DOM: Animation crash at null in [@ mozilla::dom::Animation::AutoAlignStartTime]
2032690 Settings UI [win] The action-specific icons are no longer displayed for the Windows default application
2033003 Machine Learning: Frontend Update the hint text for Custom Models endpoint URL
2035006 Design System and Theming Upstream BottomSheetHandle to compose-base
2035233 Design System and Theming Update the Nova color primitives with the latest changes
2036014 Settings UI `What should Firefox do with other files?` string is not highlighted when searched
2036782 Performance Engineering Add annotation to background hang reporter as to whether a paint is pending
2037635 Settings UI Prepare ai features tests for the SRD pref flip
2037654 Settings UI Prepare ETP tests for the SRD pref flip
2037657 Settings UI Prepare home tests for the SRD pref flip
2037659 Settings UI Prepare networking tests for the SRD pref flip
2037662 Settings UI Prepare privacy tests for the SRD pref flip
2037664 Settings UI Prepare security tests for the SRD pref flip
2037682 Security: PSM simplify getting the internal key token
2037802 DOM: Core & HTML Ship Pointer Lock Unadjusted Movement
2037830 DOM: Animation Perma TEST-UNEXPECTED-FAIL | /web-animations/interfaces/Animatable/animate.html | Element.animate() correctly sets the Animation's timeline with null timeline in KeyframeAnimationOptions. - assert_equals when Gecko 152 merges to beta on 2026-05-18
2037939 Sync Update sync disabled and single-device flows for firefox view three-dot and avatar menu
2038448 Printing Intermittent leakcheck large nsGlobalWindowInner | /_mozilla/dom
2038474 Privacy Use PromoCard component in VpnPromoCard
2038494 Audio/Video Codec Support Information in about:support mis-labels built-in codecs on Windows 10
2038510 Address Bar Intermittent browser/components/urlbar/tests/browser-searchMode/browser_searchModeSwitcher_opensearchInstall.js | single tracking bug
2038939 CSS Parsing and Computation Enable new CSS attr() on Nightly
2039037 JavaScript: GC Stop using atomic operations on the mark bitmap when not necessary
2039129 JavaScript Engine Add markers and flows for ScriptLoadRequest.
2039260 about:memory Crash in [@ core::option::expect_failed | glean_core::core::with_glean]
2039461 Interventions Generate content scripts during build-time for the new-style JS interventions in bug 2031302.
2039605 Settings UI Move Browser Layout setting from Appearance to Tabs in Settings
2039618 Settings UI The Payment methods and Addresses and more sections are reverse ordered on the passwords and autofill page
2039623 Privacy [IPProtection] Connect VPN UI toggles to actually toggle the proxy state
2039654 Crash Reporting libcrashhelper.so : abort() called after failing to create IPC server
2039681 Shell Integration desktop_entry_exists metric doesn't account for --name command line argument
2039753 Address Bar Sports suggestion UI tweaks for World Cup
2039764 Share Introduce ShareUseCases to centralize all Share launch logic
2039766 DOM: UI Events & Focus Handling Drop CRLF support in `ContentEventHandler`
2039832 Tabbed Browser: Split View Split View outline is not displayed for the left view on the left side in horizontal mode without the sidebar
2039899 General Perma [tier 2] /builds/worker/checkouts/gecko/widget/gtk/ScreenHelperGTK.cpp:X:33: error: unused function 'MakeDummyScreen' [-Werror,-Wunused-function]
2039976 Try --preset=webextensions no longer schedules Windows jobs due to 24h2 reference
2040010 about:logins Reimplement the "redirect to password change page in about:logins alerts" feature
2040020 Layout: Grid crash near null in [@ nsContainerFrame::ReflowOverflowContainerChildren]
2040038 Gecko Profiler Almost perma GeckoProfiler.ThreadRegistration_DataAccess | Expected: (aData.StackTop()) >= (aOnStackObject), actual: 0x7bd3e1183000 vs 0x7bd3f32f20a0
2040043 Sharing [Link Collections] “View page” opens the share page in a new tab but does not switch to it
2040048 Sharing [Link Collections] Tab group menu remains open over the share modal
2040055 Sharing [Link Collections] Delay between clicking create and modal appearing
2040103 General Update android nightly application-services version bump to new version 57f8450a115291363195a1b8ab7ac5640f652eab from 2026-05-16 05:03:16
2040107 CSS Transitions and Animations Use GetFlattenedTreeParentElement rather than GetParentElement in GetNamedProgressTimeline
2040115 Video/Audio Controls Frequent mac debug /picture-in-picture/exit-picture-in-picture.html | single tracking bug
2040132 PDF Viewer Update PDF.js to new version d27b9ab5fa3ee8b1197ef45c6e929968ca307aee from 2026-05-16 12:18:22
2040138 CSS Parsing and Computation Disallow any whitespace when parsing namespace in `attr()`
2040139 Layout: Ruby Let the layout.css.ruby.normalize-metrics-factor=100 pref setting ride the train
2040163 SVG Stop skipping crashtest for bug 1993379 in debug except on Android
2040165 CSS Parsing and Computation Improve rule cache behavior with appearance: base.
2040214 CSS Transitions and Animations Perma TEST-UNEXPECTED-FAIL | browser/base/content/test/static/browser_parsable_css.js | checkAllTheCSS - Got error message for chrome://browser/skin/smartbar.css: Unknown property ‘animation-timeline’. when Gecko 152 merges to beta on 2026-05-18
2040257 web-platform-tests Almost perma [tier 2] TEST-UNEXPECTED-PASS | /infrastructure/reftest/testdriver-iframe.sub.html | expected TIMEOUT
2040258 Security: PSM Perma [tier 2] /builds/worker/checkouts/gecko/security/manager/pki/resources/content/changepassword.js:41:57 | Use of unknown interface Ci.nsIPK11Token (mozilla/valid-ci-uses)
2040285 Upstream Synchronization Port bug 2037682 to Thunderbird - simplify getting the internal key token
2040360 Settings UI Settings-redesign: Custom tracking protection cookies drop down missing "block" context
2040505 Settings UI Duplicate AppUpdater in settings redesign causes update download race
2040514 Sync Update avatar and firefox view menus to handle unverified account state
2040525 Sync Move send tab menu item below profiles menu item in app and avatar menus
2040557 Layout: Form Controls Date picker min & max validations off by one day with local time zone behind UTC
2040561 Address Bar Realtime suggestions bottom text should use the selected text color when selected
2040602 Sharing [Link Collections] "Share folder" does not open the Share modal when accessed from the Bookmarks Sidebar or Library
2040685 Settings UI Translations tests fail with SRD pref flip on due to waiting on about:preferences#general
2040754 DOM: Device Interfaces WebSerial can fail to open a port that was just closed
2040775 Sync Show the Send Tab context menus when the account requires verification
2040809 Widget: Cocoa Edit > Undo and Edit > Redo do nothing when clicked from the system menu bar on macOS
2040824 Sharing Share is not created after signing in
2040953 Private Browsing Flip browser.privatebrowsing.felt-privacy-v1 to true
2041087 DOM: Selection crash near null in [@ mozilla::dom::Document::SetFocusNavigationStartingPoint]
2041113 Picture-in-Picture PiP Url bar button does not appear on eligible Youtube.com videos if you navigate to them from search or home page
2041365 Messaging System Add URL/host filtering support to the pageActionInUrlbar trigger
2041391 Settings UI Perma tr8ns Attempting to connect to non-local address! opener is [...], uri is [...] [@ mozilla::net::nsHttpChannel::OnStartRequest] | browser/components/translations/tests/browser/browser_translations_full_pag when Gecko 153 merges to beta on 2026-06-15
2041612 Add-ons Manager Add-on Manager in Thunderbird can no longer override window.isCorrectlySigned after Bug 2032014
2041795 Nimbus Desktop Client nimbus-devtools 0.3.0 can no longer force enroll
2041806 Nimbus Desktop Client canEnroll erroneously reports the same enrollment multiple times as a conflicting enrollment
1654642 WebRTC: Networking Add support for the WebRTC transport-cc extension for audio m= sections
1950764 General Crash in [@ zlib_rs::deflate::State::d_code] on Raptor Lake CPUs
1970532 Graphics: WebRender Crash in [@ <unknown in igd10um64xe.dll> | CContext::TID3D11DeviceContext_DrawIndexedInstanced_<T>]
2001218 UI Widgets Support arrow-controlled components in moz-box-group[type=list]
2004488 Settings UI Scroll position is not restored when navigating back in about:preferences
2016075 UI Widgets moz-message-bar should not always use role="alert"
2023928 UI Widgets Control+shift+up/down keboard shortcut doesn't work with NVDA for reorderable moz-box-group elements
2025058 CSS Parsing and Computation Assertion failure: aNewFrame->GetParent() == outOfFlowFrameList->mContainingBlock (Parent of the frame is not the containing block?), at /builds/worker/checkouts/gecko/layout/base/nsCSSFrameConstructor.cpp:1079
2025996 Sharing Create any triggers needed for sharing callouts
2028944 Disability Access APIs VoiceControl cannot interact with Firefox
2033617 Tabs [Tab Groups] Update a tab group's last modified field whenever a metadata update occurs
2034870 Widget: Cocoa Macos fullscreen animation which shows the menu and windows buttons shifts down the whole page
2034924 Settings UI Unscrollable and dead space at the top of the Settings tab
2036292 Layout: Scrolling and Overflow Properly use dynamictoolbar aware visual viewport size for scrollIntoView
2037177 Address Bar Add telemetry for how often users reintegrate URLs after blocking them via backspace quickly
2037242 Tabs [TabGroups Drag and Drop] Add drag and drop functionality to the Tabs List view
2037418 Settings UI moz-message-bar get announced by screen reader (NVDA) when navigating about:preferences
2037663 Settings UI Prepare search tests for the SRD pref flip
2038148 Settings UI Inconsistent behavior when dragging and dropping to change positions for custom homepage urls
2038167 Settings UI Settings > Downloads > Applications is not displayed properly when the browser is resized to the minimum width
2038570 Settings UI The 'Passwords' section briefly flashes when refreshing Privacy and Security page
2038727 Protections UI Hard-coded English text for VPN promo in about:protections
2038749 Settings UI Match sub-panes in search and attach the matches to their triggering button
2038887 Security New felt privacy error page does not show any meaningful info when DNS over HTTPS is in mode 3
2039035 Web Apps Allow overriding the icon URL from code that calls findOrCreateTaskbarTab
2039064 Settings UI Place the enterprise notice above the search bar to match Settings design
2039281 Firefox Monitor Breach alert icon animation is displayed for old breaches
2039428 Sharing Modal responsive narrow view
2039732 Memory Allocator Intermittent Assertion failure: aChunk->mPageMap[i].bits & ((((size_t)0x80U) | ((size_t)0x40U) | ((size_t)0x20U)) | ((size_t)0x08U)), at checkouts/gecko/memory/build/mozjemalloc.cpp:X
2039863 General Perma [tier2] browser/base/content/test/about/browser_releaseNotesURL.js | This test contains no passes, no fails and no todos. Maybe it threw a silent exception? Make sure you use waitForExplicitFinish() if you need it.
2040042 Sharing Share modal styling does not match design
2040385 Sharing The folder panel no longer opens after dragging the last bookmark out when Share panel is enabled
2040578 Sharing "Share folder" context menu has different position and is missing the "New" badge
2040637 Networking Perma TEST-UNEXPECTED-FAIL | netwerk/test/unit/test_ssl_token_cache_persist.js | test_ssl_token_cache_written_on_idle_daily | when Gecko 153 switches to Beta on 2026-06-26
2040819 Address Bar Adaptive autofill soft-block should count dismissal events per target not consecutive backspaces in one search session
2040926 Widget: Win32 Remove Pip window special-case from ShouldAssociateWithWinAppSDK()
2040946 Sharing Non-HTTP/HTTPS tabs are included in the Share modal and shared page tab count
2040961 Sharing [Link Collections] Share modal warning message does not match Figma specifications when more than 30 links are selected
2040971 Sidebar Perma [tier 2] browser/components/sidebar/tests/browser/browser_extensions_sidebar.js | single tracking bug
2041052 Relay getRelayProfileInfo() makes excessive API calls to Relay service on every ASRouter targeting evaluation
2041069 Messaging System Allow supporting inline links inside above_button_content text without requiring a Fluent FTL string
2041095 Settings UI Some subcategories are missing from LegacyPaneMapping
2041098 Settings UI Subcategory spotlight has two rings for setting-groups in SRD
2041134 Build Config `configure` crashes with `AttributeError` on a malformed `sourcestamp.txt` instead of warning
2041213 Sharing 'NEW' badge is missing from bookmark folder and tab groups
2041246 Widget: Cocoa Native pointer lock isn't released properly when the browser window is closed during pointer lock
2041416 Web Apps Compare image pixels instead of image dimensions in browser_taskbarTabs_icons.js
2041430 Settings UI Add telemetry for the new Passwords and autofill pane
2041461 Sharing Intermittent TV TEST-UNEXPECTED-TIMEOUT | browser/components/contentsharing/tests/browser/browser_testLoadingState.js | application timed out after 740.0 seconds with no output
2041507 General Crash in [@ java.lang.NullPointerException: at org.mozilla.geckoview.GeckoRuntime$1.handleMessage(GeckoRuntime.java)] with GeckoPreferenceController
2041664 Address Bar [Experiment] The result menu is not available for autofill results when Adaptive Autofill is enabled through an experiment
2041672 Settings UI 23.26 - 22.07% about_preferences_basic + 2 more (Linux, OSX) regression on Wed May 20 2026
2041777 Sharing Final round of string updates
2041881 Responsive Design Mode Background of responsive design mode is purple when browser.privatebrowsing.felt-privacy-v1 = true
2042051 Machine Learning: Frontend Perma browser_aiwindow_smartbar_telemetry.js , browser_aiFeatures_smart_window_telemetry.js caused by the latest ai-window-prompts.json remote settings update
2042176 Profile Backup Disable backups on macos on beta
2042309 Settings UI about:preferences#privacy is broken with MOZ_DATA_REPORTING false
2042338 Marionette [wdspec] Increase timeout for Firefox shutdown in "mozilla/tests/webdriver/harness/shutdown.py" to accomodate slower builds
2042366 Sharing Share modal errors are not recorded in about:glean
2042372 Disability Access APIs Accessibility traversal skips visible input fields with role="searchbox" in forms on Android
2042504 Sync Remove the send tab item from the hamburger menu for unverified users
2042533 Widget: Win32 Windows Taskbar shows over PiP window that is expanded into fullscreen
2042553 Messaging System Await in-flight ExperimentAPI's init for concurrent callers
2042595 Graphics: Color Management [HDR/Windows] Enumerate outputs on all adapters for multi-gpu systems
2042826 DOM: Device Interfaces Turn WebSerial pref off (but not locked) if enterprise policies are set
2042881 WebRTC Configure audio send stream bitrate range and BWE allocation.
2042957 WebRTC: Signaling JsepSessionImpl is associating transceivers with remote sendonly/inactive m-sections
2043066 Sharing The share should load in the post-login page if that tab is still open
2043313 Mach Vendor & Updatebot mach vendor and cargo-vet fails: "Some non-crates.io-fetched packages match published crates.io versions: zlib-rs"
2043413 WebRTC Avoid sending null data to NewArrayBufferWithUserOwnedContents()
2043437 Sharing Create feature entry for contentsharing experiment
2043449 DOM: Web Authentication Temporarily forbid related origin feature with conditionally mediated requests
2043551 Settings UI Settings-redesign: DNS over HTTPS setting for 2 vs 3 inversed
2043994 Privacy Enable relay by default on all builds
1201160 DOM: Service Workers Service workers violate SOP for "no-cors" CSS
1936955 Graphics Crash in [@ nsObserverService::EnsureValidCall | nsObserverService::RemoveObserver | ExpirationTrackerImpl<T>::ExpirationTrackerObserver::Destroy]
1944610 Task Configuration Refactor Windows checkout paths to use updated paths
2006121 Tooling & Investigations Details section in disclosure is not accessible by screenreader
2006157 Tooling & Investigations Details section HCM adjustment
2010302 Widget: Win32 Title Bar Disappearing on launch due to PreXULSkeletonUI being enabled incorrectly.
2028640 IP Protection 50 GB quota (shown in VPN menu) doesn't automatically get updated at the start of a new month (until you connect to the VPN)
2030838 Address Bar Frequent browser/components/urlbar/tests/browser/browser_searchModeSwitcher_basic.js | search_engines_with_accel_updown - Uncaught exception in test - Selected extension engine - timed out after 50 tries.
2032185 Audio/Video: GMP Update GMP fallback downloader for Widevine CDM 4.10.3050.0
2032753 Contextual AI [AI controls] “AI-powered features” text color does not match Figma design in AI controls page
2032959 Contextual AI [AI controls] "Block AI enhancements" prompt is cut off in Landscape mode on mobile; features list is invisible
2033520 Tabbed Browser Moving mouse cursor while holding tabs arrow button grabs a tab
2033762 Graphics: Color Management [HDR/Windows] Detect unsupported VideoProcessorBlt combinations at startup (as an alternative to blocklisting)
2034438 Machine Learning: Frontend The Google Search page performed by the AI assistant is missing from history when navigating back
2034574 DOM: Service Workers Perma macOS wpt leakcheck | default 2240 bytes leaked (CondVar, MozPromiseRefcountable, Mutex, ServiceWorkerRegistrationProxy, ServiceWorkerRegistrationProxy::Delaye, ...)
2034773 Networking: Proxy system proxy not longer functionnal on firefox v150
2035787 Security Unexpected alt text in new net error page
2037161 Tabs [Tab group UI] Outline missing from list views of tab group thumnail grid
2037611 Machine Learning: Frontend Replace thinking indicator with action log container
2037612 Machine Learning: Frontend Render tool call rows in action log
2037667 Settings UI Prepare tests listed in the main browser.toml file for the SRD pref flip
2038021 Tabs Create event for dragging and rearranging tabs
2038137 Layout: Images, Video, and HTML Frames input type image sprite: full image is shown instead of the target part
2038389 Page Info Window Page Info - Security - indicates saved passwords "Yes" for any url
2038732 New Tab Page Update region/locale defaults for Weather widget
2039600 Tabs Tabs tray has started to flash empty state every time it is opened before being populated with tabs
2039608 Address Bar Wrong search engine is used when changing search mode by keyboard shortcut via Ctrl/Cmd-Up/Down
2039791 Places Bookmark syncs failing with dogear errors
2040036 Machine Learning: Frontend Move natural language browser action UI strings into localization resources.
2040063 IP Protection Add "unlimited" to the IPP entitlement
2040065 IP Protection Update IPP bandwidth enabled pref
2040188 Address Bar urlbar dropdown has no background color
2040437 General Follow-ups to bug 2028605 to tweak the Report Broken Site redesign
2040444 Settings UI Back button trapped on about:preferences when URL hash contains a subcategory
2040511 IP Protection Return early in IPPUsageHelper and IPProtectionInfobarManager when not tracking bandwidth
2040512 IP Protection Guard IPProtectionPanel usage changed handling when not tracking bandwidth
2041228 General can no longer ctrl-a to jump to beginning of a line
2041441 Settings UI [a11y] Multiple inputs are unlabeled
2041564 Disability Access APIs Fast MSAA id reuse in iframes causing hangs/crashes in NVDA code due to vbuf tree corruption
2041569 JavaScript Engine Update irregexp to new version 33ca8a4017b75d3c7e81f0f88760fe1871b016bf from 2026-05-22 00:00:00
2041693 Design System and Theming Various icons (globe, info, history, close) have become low contrast with Light theme in Private mode
2041846 Window Management Unconditionally use PuppetWidget in nsAppShellService::CreateWindowlessBrowser
2041913 Search Search engines disabled in the old preferences will not appear in the dropdown menu
2042279 JavaScript: WebAssembly WebAssembly.compileStreaming hangs a wasm helper thread forever when the code section is truncated mid-stream
2042386 Browser Engine [LNA] add nimbus flags for LNA rollout for Android
2042603 Address Bar Sports suggestions status text should get the selected-text color when the row is selected
2042678 Graphics: Color Management [HDR/Windows] Change allowlist to blocklist and rely on detection of unsupported conversions
2042893 Address Bar Middle click paste into address bar doesn't replace existing content anymore
2043020 IP Protection Set bandwidth.enabled pref in IPPProxyManager
2043223 Settings UI Hard to search for "Backup" section once turned on with the new redesign
2043582 Settings UI Searching for something inside the settings page while the previously searched text is selected will not display the results properly
2043675 Networking: Cache Request hangs until cancellation because cache entry callback is never fired
2043706 Picture-in-Picture 221.2 - 6.32% twitch LastVisualChange + 5 more (Linux, OSX) regression on Mon May 25 2026
2043780 Homepage Missing URL search bar with Homepage Search Bar and HNT enabled
2043893 Settings UI Perma Hit MOZ_CRASH(Attempting to connect to non-local address! opener is [resource://gre/modules/addons/AddonRepository.sys.mjs:825:26], uri is [https://services.addons.mozilla.org/api/v4/addons - when Gecko 153 merges to beta on 2026-06-15
2043958 Theme Status panel text obscured by macOS Tahoe window corner radius
2043961 Disability Access APIs TV accessible/tests/browser/e10s/browser_caching_states.js | Test timed out
2044119 Tabs [Tab Groups] The second row of tab group colors is cut off on certain devices/orientations
2044120 Tabs [Tab groups] Low contrast between an expanded tab group and the tab manager background
2044222 Spelling checker Crash in [@ nsINode::OwnerDoc] on Thunderbird
2044297 Address Bar Mispositioned urlbar when using search engine
2044457 Search Add telemetry for counts of installed search engine types and which are disabled by the previous one-off setting or if they are hidden
2044482 Internationalization: Localization intl.accept_languages defaults in wrong order [lt]
2044507 Settings UI Add new toggle to remove logo/wordmark
2044530 UI Tests Swap out Pixel 10 for Galaxy S26+ on Robo-ARM
2044577 Storage: IndexedDB Align IDB deserialization helpers to use MOZ_GUARDED_BY macro
2044743 Homepage Android General Share Option
2044751 Tabs Tab group cannot be created using a tab that was just moved from inactive > active
2044754 Messaging System Fix paddings and margins of pinnable_sites components to match designs
2044798 General Non-functional code in queueEngineWarmup
2044863 SQLite and Embedded Database Bindings Upgrade to SQLite 3.53.2
2045058 Machine Learning: Frontend Make Smart Window feedback form fields optional
2045124 Machine Learning: Frontend Gate smart_window_user_feedback_data to primary button submit event only
2045363 Address Bar High frequency browser/components/urlbar/tests/browser-searchMode/browser_searchModeSwitcher_basic.js | application terminated with exit code 1 | single tracking bug
2045364 Homepage Enable the Homepage Sports Widget by default in Beta and Nightly
2045755 General "Yes please" option from "Block cookies" doesn't seem to work
2045924 Address Bar Handle is_top_pick AMP suggestions from Merino
2005200 Build Config [deb] Thunderbird debian package lacks a "1:" Epoch specifier to not be overridden by Debian repos package
2043610 Homepage [Homepage Sports Widget] [phase3] The fox mascot appears too small on the "Keep tabs on the World Cup" card
2044514 Widget: Win32 Thunderbird build broken due to inclusion of unused function
2044851 Enterprise Policies DNSOverHTTPS enterprise policy no longer enforced
2045028 Homepage [Homepage Sports Widget] [phase3] 'Extra time' words not displayed for a live game that is in extra time
2045054 Agent Temporary addon installed via base64 fails to load content scripts
2045329 Layout: Grid Subgrid with overflow: hidden and inline padding: parent row track sized as if items wrapped at the subgrid's border-box width
2045919 Experimentation and Telemetry Growth event 6 has a consistent race condition
2045922 Homepage Sports widget: show the next round's decided fixtures while the current round is still active
2046148 Homepage Sports widget: show an "Extra time" label beside the clock for live matches in extra time
2046162 Graphics Remove some unnecessary pub qualifiers.
2046519 UI Tests TestRail add_run now requires the include_all parameter, causing intermittent HTTP 500 ("Undefined array key 'include_all'") when creating test runs
2046567 Experimentation and Telemetry Add X as a new marketing partner in Adjust
2046721 Homepage [Homepage Sports Widget] [phase3] R32 future games displayed on group stage card
2046732 Homepage [Homepage Sports Widget] [phase3] The last cards in the carousel do not have a corresponding focused dot
2046970 Homepage [Homepage Sports Widget] [phase3] Fix null status clock and Halftime status on the Live match cards
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