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Nightly builds (crashes and bug fixes)

«  Friday, December 19, 2025 

#

Outstanding bugs
Bug Component Impact Summary
510459 Places 7
priority 3
severity 2
type 2
fix failing tests in bookmarks/test_savedsearches.js
1085214 DOM: Window and Location 19
priority 3
severity 2
type 1
keywords 2
duplicates 2
webcompat 3
cc 4
see_also 2
Implement Location.ancestorOrigins
1916884 Session Restore 4
priority 3
type 1
Restore Last Closed Tab doesn't restore tab in another window if there are no tabs to restore in the current window
1955682 DOM: Core & HTML 4
priority 3
type 1
Implement platform support for generate-test-report for the Reporting API
1995869 Networking 5
priority 4
severity 2
type 1
regressions -2
Socket thread delegates to the main thread for DNS service initialization, delays first network request
1999828 JavaScript Engine: JIT 1
priority 4
type 1
regressions -4
Splay benchmark unfortunate dual-shape access and store.
2000881 Machine Learning: Frontend 6
priority 5
type 1
persist ai-window session and restore
2001183 Toolbar 7
severity 2
type 1
duplicates 4
[toolbar redesign] Toolbar preview touches edges in small devices
2002127 Translations 1
type 1
Migrate the Translations Settings to Conform to the Settings Redesign
2004391 Sync 1
type 1
Update application-services version bump to new version 0376c542e4a31cde8d33dd0e8da17dcfbc6c58b2
2005797 Settings UI 6
priority 4
type 1
see_also 1
Create gen ai features section with sidebar chatbot settings
Other bugs
Bug Component Impact Summary
1693051 Perfherder 3
priority 3
Update tests with suite-level values to produce replicates at the suite-level
1762249 Compatibility 7
priority 3
severity 2
type 2
tabs.create() fails when it is called with "openerTabId" for a discarded tab
1802904 DOM: Copy & Paste and Drag & Drop 6
priority 1
severity 1
type 2
keywords 2
Frequent dom/events/test/test_drag_image_file.html | single tracking bug
1909662 Marionette 5
priority 3
duplicates 2
implement generate test report for Reporting API
1944570 WebDriver BiDi 4
priority 4
Support executing “script.evaluate” and “script.callFunction” for browsing contexts in the parent process
1961568 Address Bar 6
priority 3
severity 1
type 2
Unified search button missing in about:newtab on private window
1968218 Address Bar 7
priority 3
severity 2
type 2
Persisted search term is displayed after after a websearch refinement while using DDG as default engine
1971445 Settings UI 5
priority 5
Create ETP > Custom > Customize settings in config-based prefs
1988842 General 5
priority 1
severity 1
type 2
see_also 1
Intermittent org.mozilla.geckoview.test.MediaDelegateXOriginTest#testDeviceRecordingEventAudioAndVideoInXOriginIframe | single tracking bug
1992749 Lint and Formatting 0
Implement semantic token usage linting rules
1994286 Tabs 0
[Tab Management Search] Add search results section
1994496 General 0
Increase the version of the MSVC STL we use to at least VS 2022 17.14
1995819 Security: PSM 5
priority 5
update pkijs to 3.3.1
1997881 Tabbed Browser: Split View 9
priority 5
severity 2
type 2
The inactive view footer is displayed over the Find in page
1999334 Search 5
priority 5
Remove old non-handoff content search UI code
1999946 IP Protection 4
severity 2
type 2
Reconnecting the internet after triggering the error state causes pages not to load
2000063 Tabbed Browser 1
priority 5
regressions -4
Allow moving the mouse into the tab hover preview panel
2001752 Toolbars and Customization 3
priority 3
Record probe for actions in the List all tabs (TOM/overflow) menu
2002533 Security 8
priority 4
severity 2
type 2
Cert Error code text overflows on the right
2002625 JavaScript: WebAssembly 5
priority 5
Remove CallOnMainStack
2002635 JavaScript: WebAssembly 3
priority 3
Unship asm.js
2002930 Settings UI 5
priority 3
severity 2
Credit Cards display last digits in reverse order in Payment methods subpage
2002936 Address Bar 8
priority 4
severity 2
type 2
"switch to [tab group]" broken from tabs on sites with search functionality
2003226 JavaScript Engine: JIT 4
priority 1
severity 1
type 2
riscv64: MacroAssembler::wasmCheckSlowCallsite doesn't account for `jal` sequence length
2003238 Netmonitor 7
priority 3
severity 2
type 2
network throttling can't be disabled
2003471 Settings UI 5
priority 5
Implement tests for the ETP advanced and customize section
2003587 Security 0
Enable security.certerrors.felt-privacy-v1 pref by default
2003710 Tabbed Browser 5
priority 5
"Update Note" (edit/delete) tab context submenu for tab notes
2003861 JavaScript: WebAssembly 7
priority 5
duplicates 2
Update wasm-tools to version 0.243
2004260 General 5
priority 3
severity 2
Turn devtools/client/shared/test-helpers/jest-fixtures/Services.js into an ES class
2004596 Layout 7
priority 3
severity 2
type 2
Deal with both position-area and grid CB adjustments together.
2004729 Settings UI 5
priority 5
In the new preferences design the baseline exception list checkbox should show a confirmation dialog if unchecked
2004773 New Tab Page 0
Enable image proxy for newtab
2004843 Machine Learning: General 0
[AI Window] Implement get_page_content tool
2004964 IP Protection 4
priority 4
Add capability for warning type messages in Firefox VPN panel
2005000 Tabbed Browser 5
priority 5
Update tab-notes-12 SVG icon
2005120 JavaScript Engine: JIT 1
priority 1
riscv64: Use Zba `add.uw rd, rs1, zero` (aka `zext.w rd, rs1`) to simplify ZeroExtendWord
2005443 Tooling 0
Remove MiddlewareContext
2005484 Console 2
type 2
Embedded TabboxPanel tab text is blue
2005571 DOM: Navigation 4
severity 2
type 2
Crash in GetContiguousEntriesForLoad
2005637 Machine Learning: Frontend 0
Create sidebar to LLM and back pipeline for AI window
2005850 Design System and Theming 3
priority 3
Migrate to using the Material3 color tokens - Part 3
2005895 DOM: Editor 6
severity 2
type 2
keywords 2
Caret position confused after backspace delete, leading to erroneous further deletions
2006002 Layout: Positioned 2
type 2
Anchored popover does not follow element when scrolling viewport
2006028 Networking 6
priority 4
severity 2
Remove predictor code
2006066 Settings UI 13
priority 4
severity 5
type 2
keywords 2
Credit cards autofill settings are not visible
2006102 Networking 4
priority 4
Update neqo to v0.21.0
2006158 Task Configuration 0
Ensure release-level takes Github branches into account
2006298 Onboarding 0
Add new onboarding strings so we can localize before string freeze Fx 148
2006308 UI Tests 0
Enable the composable toolbar and main menu in UI tests
2006371 Layout: Positioned 7
priority 3
severity 2
type 2
@position-try should not win over CSS transitions
2006388 General 0
Improve JSDoc for JsonSchemaValidator.sys.mjs
2006402 Layout: Positioned 4
severity 2
type 2
Check that default anchor is valid before forcing auto inset values to 0
2006464 Enterprise Policies 4
priority 1
severity 1
type 2
Intermittent browser/components/enterprisepolicies/tests/browser/browser_policy_disable_password_reveal.js | single tracking bug
2006480 DOM: Core & HTML 0
HIgh freq dom/base/test/fullscreen/test_fullscreen-api.html | Should not have horizontal scrollbar when [object HTMLDivElement] is in fullscreen - got 1163, expected 1200
2006492 Crash Reporting 8
priority 1
severity 1
type 2
keywords 2
duplicates 2
Perma ccov check> thread 'main' panicked at toolkit/crashreporter/crashping/tests/single_instance.rs:52:13:
2006499 Layout: Positioned 7
priority 3
severity 2
type 2
Fix css/css-anchor-position/position-try-backdrop.html
2006518 Experimentation and Telemetry 5
priority 5
Add new ToU bottom sheet strings and Nimbus variable for experimentation
2006557 Mochitest 0
TypeError: Too few arguments
2006582 JavaScript Engine 0
Perma js/src/jit-test/tests/wasm/features.js | /builds/worker/checkouts/gecko/js/src/jit-test/tests/wasm/features.js:77:13 Error: Assertion failed: got false, expected true - when Gecko 148 merges to beta on 2026-01-12
2006591 Layout 0
Perma [tier 2] backlog /scroll-animations/css/scroll-timeline-range-animation.html | Animation with ranges [0%, 100%] - expected TIMEOUT | single tracking bug
2006613 DOM: Core & HTML 7
priority 3
severity 2
type 2
Optimize removing all nodes of a shadow host a bit.
2006731 Tooling 0
Update AndroidX Activity to version 1.12.2
2006750 JavaScript Engine 8
priority 4
severity 2
type 2
Fix accidental exposure of Promise.allKeyed and Promise.allSettledKeyed
2006759 Settings UI 6
priority 3
severity 1
type 2
Typo in browser/browser/preferences/preferences.ftl prefs-syncing-off-2
2006804 Layout: Positioned 3
severity 1
type 2
Firefox fails WPT /css/css-anchor-position/position-try-fallbacks-limit.html
2006807 Machine Learning: Frontend 0
Add ChatConversation methods to support chat state rendering
2006823 Theme 0
on Bookmarks and old History sidebar, Selected item is black text with dark background
2006847 Networking 0
Perma windows 10 [tier 2] netwerk/test/unit/test_proxyDNS_leak.js | test_proxyDNS_do_leak - [test_proxyDNS_do_leak : 99] Should find a DNS entry - false == true
2006861 Task Configuration 0
migrate more gecko tasks to d2g linux worker pools
2006914 CSS Parsing and Computation 2
type 2
Remove some dead anchor-side code.
2006953 about:memory 2
type 2
Make memory reporter timeout a pref.
2006995 Tooling 0
Fix some Gradle space assignment warnings
  1. mozilla::SharedSubResourceCache<T>::LoadCompleted (7.69%)
  2. IPCError-browser | ShutDownKill (5.13%) Known top crash
  3. AsyncShutdownTimeout | IOUtils: waiting for sendTelemetry IO to complete | TelemetryController: shutting down (3.85%)
  4. IPC::MessageReader::FatalError | IPC::ParamTraits<mozilla::layers::PTextureParent*>::Read | IPC::ParamTraits<mozilla::ipc::SideVariant<T> >::Read | IPC::ParamTraitsMozilla<T>::Read | IPC::ParamTraits<mozilla::layers::OpRemoveTexture>::Read | IPC::Param... (3.85%)
  5. OOM | small (3.85%) Known top crash
  6. js::gc::ChunkMarkBitmap::markIfUnmarked (3.85%)
  7. mozilla::gfx::sRGBColor::sRGBColor (3.85%)
  8. mozilla::net::LoadInfo::SetReservedClientInfo (3.85%)
  9. AsyncShutdownTimeout | profile-change-teardown | ServiceWorkerShutdownBlocker: shutting down Service Workers (2.56%)
  10. EnterJit (2.56%)
  11. JS::Heap<T>::exposeToActiveJS (2.56%)
  12. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::GetGCKindSlots (2.56%)
  13. VerifyCientPrincipalInfosMatch (2.56%)
  14. _gdk_x11_get_window_child_info (2.56%)
  15. js::gc::detail::ChunkPtrHasStoreBuffer (2.56%)
  16. mozilla::ComputedStyle::GetPseudoType (2.56%)
  17. mozilla::CycleCollectedJSContext::PerformMicroTaskCheckPoint (2.56%)
  18. mozilla::dom::quota::QuotaManager::Shutdown::<T>::operator() (2.56%)
  19. nsFrameLoader::ReallyStartLoadingInternal (2.56%)
  20. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout (2.56%)