Current Desktop beta cycle: 147

Uplifts by Product
89 uplifts

  1. OOM | small (18.39%) Known top crash
  2. mozilla::dom::Navigation::UpdateEntriesForSameDocumentNavigation (14.22%) Top crash 1999518
  3. core::result::unwrap_failed | rayon_core::latch::impl$6::set (3.88%)
  4. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (3.59%) 1472062
  5. fcagff.dll | FileRead (2.44%)
  6. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (2.16%) 1969401
  7. mozilla::wr::RenderThread::PostRunnable (1.87%) 1886765
Uplifts and Backouts
Bug Component Summary
2003720 DOM: Navigation Back out sync-about-blank (bug 543435) from 147 beta
2004385 Graphics: WebGPU [Late Beta] Perma win 11 debug /_mozilla/webgpu/cts/webgpu/web_platform/worker/worker/cts.https.html?q=webgpu:web_platform,worker,worker:service_worker:* - when Gecko 147 switches to beta on 2025-12-19
2004452 Toolbar Floating cursor handle in the Toolbar
  1. mozilla::dom::Navigation::UpdateEntriesForSameDocumentNavigation (17.51%) Top crash 1999518
  2. OOM | small (14.85%) Known top crash
  3. core::result::unwrap_failed | rayon_core::latch::impl$6::set (3.65%)
  4. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (1.94%) 1969401
  5. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (1.79%) 1472062
  6. mozilla::wr::RenderThread::PostRunnable (1.75%) 1886765
  7. js::gc::detail::ChunkPtrHasStoreBuffer (1.71%) 1980548
Uplifts and Backouts
Bug Component Summary
1924786 Layout Extend anchor positioning support to work in CSS grid
1998185 Networking Crash in [@ NS_InputStreamIsBuffered]
2000429 Privacy: Anti-Tracking Fingerprinting protection breaks some fonts on Instagram, Facebook, X, YouTube (and probably other websites)
2004072 Layout Pass a SizeComputationInput to nsIFrame::ComputeSize and friends
2004166 Layout: Positioned Assertion failure: aNewAbsoluteContainingBlock->GetAbsoluteContainingBlock() (nsIFrame::Init() should've constructed AbsoluteContainingBlock in this case, since the frame is a continuation!)
2004191 WebDriver BiDi Internal "navigation-committed" event payload doesn't always contain the real target URL
2004330 Address Bar canUseSemanticSearch is wrongly removing the database on startup
2004459 Experimentation and Telemetry Disable the custom review prompt - temporary fix
2004612 Design System and Theming Add a Surface to StartupCrashScreen
2004766 DOM: Security Perma beta [tier 2] /content-security-policy/securitypolicyviolation/targeting.html | These tests should not fail. - expected NOTRUN
2004769 DOM: Performance APIs Perma beta /largest-contentful-paint/image-upscaling.html | Non-scaled image should report the natural size - expected TIMEOUT
1999700 Other …
1996570 Other …
  1. OOM | small (18.47%) Known top crash
  2. core::result::unwrap_failed | rayon_core::latch::impl$6::set (4.84%)
  3. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (2.75%) 1969401
  4. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (2.18%) 1472062
  5. mozilla::wr::RenderThread::PostRunnable (1.95%) 1886765
  6. js::gc::detail::ChunkPtrHasStoreBuffer (1.68%) 1980548
  7. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::TraceEdgeInternal (1.61%) 1472062
Uplifts and Backouts
Bug Component Summary
1895176 Inspector: Rules Display @position-try rules
1895178 Inspector: Rules [Inactive CSS] Add inactive CSS for unsupported properties in @position-try
1895179 Inspector: Rules Mark !important values for supported properties in @position-try as invalid
1991206 DOM: Core & HTML Assertion failure: commonAncestor (unexpected disconnected nodes), at /dom/base/AbstractRange.cpp:437
1991929 Layout: Positioned Shrink-wrapping for position-area doesn't work
1993707 Toolbar [Composable toolbar] No event is generated for security_indicator
1994918 Widget: Win32 Double clicking over top or bottom border of a window to vertical maximize stopped working
1998404 Browser Engine www.webmd.com - Find in page bar disappears when it scrolls down through the findings
1999838 Widget: Gtk [X11] Entering and exiting full screen breaks internal window layout in Firefox 145 on my Linux X desktop
2003591 CSS Parsing and Computation Shift anchor() insets into the position-area-modified CB
2003704 Crash Reporting Guard against broken serializable in bundles
2003884 UI Widgets Disabled options in moz-select not visually indicated on Windows
2003887 Crash Reporting Silently fail when crash services cannot be started from the background
2004018 Widget: Win32 Can't click fxview button or leftmost half of first tab (basically, leftmost ~118px) using the topmost row of pixels in a maximized window
2004040 Layout: Positioned anchor-center bug when overflowing the viewport
2004161 Layout: Positioned Fix position-area default self-alignment
2004591 Panning and Zooming move to nsLayoutUtils::GetASRAncestorFrame to DisplayPortUtils and separate it from GetNearestScrollableOrOverflowClipFrame in nsLayoutUtils
2004703 Settings "Back" option is white with light theme
2004850 WebRTC WebRTC simulcast video stops sending after running for a while
2004868 General AppServicesTracing may repeat log messages many times.
2004902 DOM: Navigation Frame busting check that fails causes assertion crash in Navigation API
2005019 Toolbar [toolbar redesign] Disable toolbar CFR when in performance testing.
2005214 Layout: Positioned Fix position-area default self-alignment for different writing modes
2005218 Toolbar [toolbar redesign] Enable toolbar customization option for all builds
2005535 UI Tests Disable the verifyTheExtensionInstallationTest UI test
2005573 DOM: Navigation Navigation::SetCurrentEntryIndex does some bad logging
2004602 Other …
1924125 Other …
  1. OOM | small (19.37%) Known top crash
  2. core::result::unwrap_failed | rayon_core::latch::impl$6::set (4.48%)
  3. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (2.99%) 1969401
  4. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (2.67%) 1472062
  5. js::gc::detail::ChunkPtrHasStoreBuffer (2.03%) 1980548
  6. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::TraceEdgeInternal (1.65%) 1472062
  7. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::Nursery::maybeMoveRawBufferOnPromotion (1.49%) 1472062
Uplifts and Backouts
Bug Component Summary
2002636 Toolbar [toolbar redesign] Implement telemetry for toolbar customization
2002655 Toolbar [toolbar redesign] Add source for translate and back
2003352 Toolbar [toolbar redesign] Refactor AddressBar source into smaller subcomponents
2003843 Graphics: WebRender anchored elements can incorrectly be drawn with the transform of the anchor
2003885 Networking: Cache Diagnose craches at CacheFileChunkBuffer
2004089 Search Microphone icon is not displayed in the Search widget
2004455 Toolbar [toolbar redesign] Add telemetry for translate action in toolbar
2004600 Panning and Zooming ActivateDisplayportOnASRAncestors will skip over a sticky asr if it's at the end of an anchor chain of least 2 frames
2004637 Inspector: Rules [Inactive CSS] justify-self is inactive on flex items
2004833 Graphics: WebRender use scroll-linked-effects code for anchor pos scrolling we can't represent as async scrolling to improve experience
2005108 New Tab Page Logic bug in epsilon click based telemetry
2005255 Other startup Crash in [@ ntdll.dll | inprocessclient64.dll | mozilla::interceptor::FuncHook<T>::operator()] with SentinelOne
2005460 Design System and Theming The BottomSheetHandle seems to have extra padding which increases the empty space around it.
2005500 General startup Crash in [@ libc.so | art::Runtime::Abort]
2005503 Crash Reporting Fix srcsrv mapping in PDB files
2005526 Layout: Positioned Fix position-area alignment for popovers (auto margins)
2005673 Agent "save file as" dialog does not open anymore in Firefox frontend tests
2005749 Networking: Cache Reports of Content Encoding Errors on google.com with Compression Dictionaries
2005771 DOM: Navigation Navigation API: Always reset `mOngoingNavigation`
2005794 Profile Backup Switch archiveKillswitch handling to enable backup functionality by default on Windows 10
2005014 Other …
2005658 Other …
  1. OOM | small (14.76%) Known top crash
  2. core::result::unwrap_failed | rayon_core::latch::impl$6::set (5.60%)
  3. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (4.07%) 1969401
  4. js::gc::detail::ChunkPtrHasStoreBuffer (4.07%) 1980548
  5. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (2.54%) 1472062
  6. google::protobuf::EncodedDescriptorDatabase::Add (2.29%) 1991378
  7. js::gc::ChunkMarkBitmap::markIfUnmarkedThreadSafe (2.04%) 1974595
Uplifts and Backouts
Bug Component Summary
1999838 Widget: Gtk [X11] Entering and exiting full screen breaks internal window layout in Firefox 145 on my Linux X desktop
2002446 DOM: Core & HTML Crash at mozilla::dom::HTMLDocument_Binding::DOMProxyHandler::get and Assertion failure: isObject()
2004350 Widget: Gtk [Wayland/KDE] KWin rendering is blurred for some window sizes
2004502 Privacy: Anti-Tracking privacy.query_stripping.strip_on_share.enabled disables the ability to create text fragments
2004542 Browser Engine Crash in [@ org.mozilla.gecko.EventDispatcher$QueryException: at org.mozilla.gecko.EventDispatcher$CallbackResult.sendError(EventDispatcher.java)]
2004922 Glean: SDK Release and merge back Glean v66.2.0
2005174 JavaScript: Internationalization API Tweak the wording about "islamic" in DateTimeFormat
2005209 DOM: Navigation Regression: Security Error: Content at resource://pdf.js/web/viewer.html may not load data from file:///path/to/file.pdf
2005469 DOM: Core & HTML Fedora GCC 15.x aarch64 builds crashes at nsHtml5Tokenizer::StateLoopLineColALU (Stub)
2005646 Experimentation and Telemetry Enable COPPA in adjust for digital turbine distributions
2005756 Layout: Positioned anchor-center should not clear manually-set margin.
2005874 Agent Perma beta TEST-UNEXPECTED-PASS | navigation Page.goto should fail when server returns 204 (navigation.spec.js) | expected TIMEOUT
2005909 Networking: Cache Revalidate dictionary hashes to catch cases where a dictionary was replaced but the entry wasn't removed
2006091 Theme Sidebar text has low contrast with vertical tabs enabled for themes with contrasting frame/toolbar colors
2006097 CSS Parsing and Computation Containing Block Adjusted by `position-area` Includes Scroll Offset
2003588 Other …
2003607 Other …
2005081 Other …
Uplifts and Backouts
Bug Component Summary
1981503 Audio/Video: Playback Corrupt HEVC decoding on Android
1998761 DOM: Navigation Navigation API Key isn't copied over to new entry for cross-document replace navigations
2000849 JavaScript Engine 13.06 - 5.41% jetstream3 raytrace-private-class-fields-Average / jetstream3 raytrace-private-class-fields-Geometric + 5 more (Linux, OSX) regression on Thu November 13 2025
2005793 DOM: Navigation Assertion failure: false (FIXME), at /builds/worker/checkouts/gecko/dom/navigation/Navigation.cpp:382
1998650 Other …