«  Firefox 150 release uplifts 

Uplifts by Product
129 uplifts

  1. OOM | small (13.06%) Known top crash
  2. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (5.79%) 1969401
  3. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (4.67%) 1472062
  4. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout (3.15%) 1866944
  5. NS_CycleCollectorSuspect3 | nsCycleCollectingAutoRefCnt::decr (2.57%) 2036484
  6. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadManager::SpinEventLoopUntilInternal (2.50%)
  7. js::gc::detail::ChunkPtrHasStoreBuffer (2.35%) 1980548
Uplifts and Backouts
Bug Component Summary
2015485 Machine Learning: Frontend The "Ask" button from the toolbar does not have a Clicked State
2016994 Address Bar Address bar has incorrect width in taksbar tabs
2017257 Machine Learning: Frontend Unable to reach the Used Memories from the Memories used panel with Keyboard navigation
2021892 DOM: Core & HTML Make `navigator.permissions.query` aware of platform permission when appropriate
2023406 Audio/Video Frequent dom/media/mediacontrol/tests/browser/browser_media_control_metadata.js | testMetadataMutation - tile 'initial title' is equal to mutated title - Got "initial title", expected "mutated title" | single tracking bug
2024499 Machine Learning: Frontend Implement dark mode styling for chips
2026536 Startup and Profile System Use atomic writes when writing out profiles.ini and installs.ini
2027798 Graphics: WebRender percentage border-radius values for all four corners not rendering properly
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)
2028130 CSS Parsing and Computation "display: inherit" on `<option>` changed behavior in bug 2011709 (now inherits from the internal slot)
2028326 Graphics: WebRender Hero Element on https://huggingface.co/spaces/CohereLabs/cohere-transcribe-03-2026 draws incorrectly
2028443 JavaScript: Internationalization API Wrong time zone abbreviation for London time in en-GB during the effect of the British Standard Time Act of 1968
2028692 Machine Learning: Frontend Add jump-to-bottom button for chat overflow
2029204 Machine Learning: Frontend Add a stop button for assistant chat (dev issue)
2029229 Machine Learning: Frontend Enable back/forward navigation across Smart Window states
2029231 Machine Learning: Frontend Add close button to sidebar chat
2029237 Machine Learning: Frontend Disable smart cursor interaction
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
2030043 Graphics: WebRender Missing borders when pinch zooming on www.linkedin.com
2030585 Performance 279.7 - 229.61% a11yr + 1 more (Windows) regression on Thu April 2 2026
2031230 WebDriver BiDi Puppeteer permission tests using "navigator.permissions.query" are failing on Windows since bug 2021892
2031958 Audio/Video: Playback media/ffvpx/libavcodec/parsers.c:114:30: error: initialization of ?const FFCodecParser *? from incompatible pointer type
2031961 Session Restore Unable to add tabs to old closed tab groups (tabGroupState.splitViews is undefined)
2032188 WebRTC Have reasonable limits for frames with s transform
2032236 Graphics: ImageLib Update libpng to new version v1.6.58
2033117 CSS Parsing and Computation Nimbus Experimenter page's "Min Version" and "Max Version" drop-down menus are expanded to show every list element
2033229 General Crash in [@ mozilla.appservices.viaduct.ViaductException$SetBackendException: at mozilla.appservices.viaduct.FfiConverterTypeViaductError.read(viaduct.kt:21)]
2033611 Nimbus Desktop Client Firefox Labs opt-in list cleared at first startup
2033840 DOM: Navigation Extend GWT RichTextArea compat hack to the Editor version in Polarion
2034120 Geolocation Provider Rejecting to enable system permission does not stop the browser to show system permission on a second attempt
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
2034178 Untriaged Facebook does not open in Firefox 150.0 (HTTP/3 stalled by endpoint protection?)
2034189 Security: PSM Upgrade Firefox 150 to NSS 3.122.2
2034530 Experimentation and Telemetry Third party sharing configuraiton should be done before Adjust SDK initialization
2034706 CSS Parsing and Computation Perma mozilla-release browser/base/content/test/static/browser_parsable_css.js | checkAllTheCSS - Got error message for resource://gre-resources/forms.css: Unknown pseudo-class or pseudo-element ‘picker’. | single tracking bug
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Not yet shipped

Uplifts and Backouts
Bug Component Summary
2021258 Performance Engineering Use NDK AChoreographer for vsync on Android
2021390 Machine Learning: Frontend Increasing the width of the AI chatbot sidebar leaves the (x) close button and meatball menu behind
2021596 Homepage edge to edge wallpaper causes color-flicker in system status-bar, and mismatched top/bottom bar colors, when editing the URL of an open tab
2023715 Machine Learning: Frontend Disallow cursor entry into smartbar + and memories areas
2025637 Autofill Crash in [@ java.lang.RuntimeException: at android.view.autofill.AutofillManager.isAutofillSupported(AutofillManager.java)]
2027793 Tabbed Browser: Split View “New” badge persists after using Split View
2028249 Machine Learning: Frontend Almost perma | browser/components/aiwindow/ui/test/browser/browser_smartwindow_tab_switching.js | | test_ask_button_close_persists_across_tab_switches - Sidebar should remain closed after switching back | single tracking bug
2028424 Machine Learning: Frontend Using the UP/Down arrows on the More Options menu will close the suggestion drop down
2028676 Machine Learning: Frontend [a11y] Answer to user's question not obvious to screen reader users
2030461 DOM: File Tab crash after drag-and-dropping and reading nested folder structure
2030728 Toolbar Crash in [@ java.lang.StringIndexOutOfBoundsException: at java.lang.String.charAt(Native Method)]
2032054 Onboarding Display notification card regardless of “Set as default browser” prompt response
2034283 Graphics: WebRender transform-style: preserve-3D does not preserve as expected in vers. 150+
2034336 General Potential issues with edge-to-edge support applying too big paddings to screens
2034395 Audio/Video: GMP Crash in [@ nsIEventTarget::Dispatch]
2034653 Performance Revert 1979760 for metrics regression
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
2034752 Networking: HTTP on-premise azure devops no longer works with firefox 150
2034962 Tabs Tab closed info toast overlaying last tab in tab list
2034980 PDF Viewer Can't highlight image scans in Firefox 150+
2035353 Address Bar Rich search suggestion icons are forced into a square aspect ratio
2035801 Security: PSM Disable the pref security.ssl3.ecdhe_ecdsa_aes_128_sha for release
2011921 DOM: Navigation Crash in [@ mozilla::dom::BrowsingContextWebProgress::ContextReplaced]
2021961 Homepage toolbar abruptly switches from gray to blue (edge-to-edge wallpaper color), when you empty the address bar (and then back to gray when you type a character)
2029240 Profile Backup Local Firefox backup fails every time
2032069 Onboarding [continuous onboarding] The "Notifications" card is displayed in day 7 even if the notifications were already allowed
2033313 Toolbar "Fill link from clipboard" appears with transparent background
2034897 Layout: Images, Video, and HTML Frames contain: size image ignores aspect ratio from width/height attributes
2035112 Layout When the page zoom level is not 100%, the position of the drop-down list shifts
2035525 Application Update [macOS] Firefox remains in update state and cannot be launched afterwards on a standard macOS profile
2035530 PDF Viewer PDF Viewer Highlighter Tool doesn't work Freehand anymore, only when selecting Text
2036062 Performance Don't run perfdocs on non-nightly code-review runs
2036121 Tabbed Browser Reloading multiple highlighted tabs with Reload toolbar button or reload shortcuts.
2036365 Graphics: WebRender Slow composites when using DComp. Time spent in NtFlipObjectAddPoolBuffer and ZwFlipObjectRemoveContent
2036597 Graphics: CanvasWebGL WebGl doesn't work in headless mode on macOS since Firefox 150
2036856 Experimentation and Telemetry Change active_first_day event for first run event
2037193 Experimentation and Telemetry Allow more marketing campaign users to opt in to marketing ToS
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