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Nightly builds (crashes and bug fixes)
This is a staging environment for whattrainisitnow.com

«  Saturday, February 14, 2026 

#

Outstanding bugs
Bug Component Impact Summary
1978773 Graphics: WebRender -1
type 1
regressions -2
Render gradients from gradient stops directly
1993037 Frontend 5
priority 4
type 1
regressions -2
see_also 2
Expose splitViewId in tabs extension API
2009873 Third Party Packaging 20
priority 1
severity 1
type 2
duplicates 16
Perma Snap [tier 2] test_pdf_navigation | AssertionError('Mismatching screenshots for test_pdf_navigation_<random>') | single tracking bug
2013500 Privacy: Anti-Tracking 4
priority 3
type 1
Strip "wt_mc" parameter on "copy clean link"
2015921 Machine Learning: Frontend 6
priority 5
type 1
default assistant sidebar to open with new conversation if no previous conversation
2016872 Shell Integration 24
priority 5
severity 5
type 2
tracking_firefox149 4
tracking_firefox148 4
tracking_firefox147 4
Pinning Firefox to taskbar nonfunctional in Windows 11 Build 7840
Other bugs
Bug Component Impact Summary
1936770 WebDriver BiDi 4
priority 4
duplicates 2
regressions -2
Implement "script.realmCreated" and "script.realmDestroyed" events for worker realms
1988133 Site Reports 10
priority 3
severity 1
type 2
webcompat 4
apps.facebook.com - "Bejeweled Blitz" game not loading caused by Flash
1991327 New Tab Page 3
type 2
see_also 1
firefox background gif maxing out ram while idle in the background
1994355 Storage 11
priority 4
severity 2
type 2
duplicates 2
see_also 1
After opening the Storage tab in Developer Tools, browser.storage.onChanged does not fire for object writes.
1996722 Privacy 4
duplicates 4
Implement snackbars for offline user and request timeout and no free masks available
2008036 Tabbed Browser 6
priority 5
see_also 1
Create Nimbus feature for tab notes
2010337 Lint and Formatting 0
Consolidate no-non-semantic-token-usage stylelint rule into use-design-tokens
2011353 DOM: Animation 0
Use animationsPlayBackRateMultiplier browsing context flag to control animation speed
2012500 IP Protection 2
duplicates 2
Set bandwidth usage pref based on bandwidth thresholds
2012830 Machine Learning: General 2
duplicates 2
Move real time context prompts to remote settings
2013056 Settings UI 0
In the new search UI, indicate when an add-on based search engine is installed
2013251 CSS Parsing and Computation 0
Implement initial support for CSSNumericValue.to()
2013505 JavaScript Engine 3
priority 3
Remove Promise Thenable Telemetry
2013627 Machine Learning: Frontend 2
type 2
PageData actor is not available during page description collection
2014385 Search 0
[Search Optimization] Secret menu settings for search optimization stocks card toggle
2014565 Networking: Cache 8
priority 4
severity 2
type 2
Assertion failure: false (Dictionary should be ready before decompression), at /builds/worker/checkouts/gecko/netwerk/streamconv/converters/nsHTTPCompressConv.cpp:70
2014761 Tabbed Browser: Split View 0
Splitter can't be moved to the left side using keyboard arrows if it was moved to the maximum on the right side
2014931 Machine Learning: Frontend 8
priority 5
severity 1
type 2
fix suggestion dropdown visual issues from browser-shared.css removal exposed by 2008977
2015055 Privacy: Anti-Tracking 7
priority 3
severity 2
type 2
Crash in nsUserCharacteristics::ShouldSubmit() with copied profile
2015206 Startup and Profile System 5
severity 1
type 2
keywords 2
20,200 instances of "Existing entry in StartupCache." emitted from startupcache/StartupCache.cpp
2015549 Machine Learning: Frontend 0
The "Ask" sidebar button is displayed on the Newtab/Homepage with Vertical Tabs enabled
2015600 New Tab Page 3
type 2
see_also 1
In new-tab small tiles, the publisher name potentially overlaps the 3-dot-menu when hovered
2015690 General 11
priority 4
severity 5
type 2
GitHub checks for enterprise-firefox-release links to treeherder enterprise-firefox jobs
2015713 Firefox Source Docs: Content 0
fix doc warnings
2015841 Lint and Formatting 0
Update to ruff 0.15.0
2015935 Nimbus Desktop Client 2
priority 2
Adding Adaptive Performance Prefs to Nimbus Manifest
2015987 Browser Engine 0
Add Downloadable LLM abstraction to concept-llm
2016308 JavaScript Engine: JIT 4
type 2
keywords 2
[riscv64][loong64] debugAssertCanonicalInt32 is hit in `jit-test --ion wasm/multi-value/call-js.js`
2016466 JavaScript: GC 0
Tidy the buffer allocator a little
2016494 Onboarding 0
Update xiaomi distribution logic to skip the adjust onboarding screen
2016508 Privacy: Anti-Tracking 0
Clean up Storage Access API console error logging
2016523 CSS Transitions and Animations 0
Remove more failure-allowing annotations for View Transitions WPTs
2016565 Tabs 0
Re-enable the tab opening animation in nightly
2016573 Android Studio and Gradle Integration 6
priority 4
type 2
Gradle Configuration Cache is invalidated on any change within `topobjdir`
2016629 Privacy 1
see_also 1
Update Eligible.Free#remaining to Eligible.Free#totalMasksUsed
2016653 SVG 0
Improve packing of SVGSVGElement
2016670 DOM: Core & HTML 2
type 2
Improve some DevTools context menu checks.
2016715 Firefox Source Docs: Content 0
Update the code review faq
2016746 Web Apps 0
Taskbar Tabs files aren't associated with the Web Apps bug component
2016752 Interventions 2
type 2
Remove two no-longer used "testbed" files from our webcompat addon.
2016757 Experimentation and Telemetry 4
severity 2
type 2
Enable Adjust for growth data
2016795 JavaScript: Standard Library 3
priority 3
Update Promise.all/allSettled/any step numbering to match ES2026 spec changes
2016808 Installer 5
priority 5
Update installer string for the rebrand
2016851 CSS Parsing and Computation 0
Remove pass/fail-allowance annotations in css/css-color/animation/color-interpolation.html.ini
  1. dri2_allocate_textures (71.43%)
  2. abort | libgallium-26.0.0.so (14.29%)
  3. cmd_buffer_subpass_handle_pending_resolves (7.14%)
  4. js::IsProxy (7.14%)