Bug 1673930 R[Core:CSS Parsing and Computation]Incorrect invalidation of class selectors: stylesheets added by windowUtils.addSheet are sometimes not applied
Bug 1673885 A[Core:CSS Parsing and Computation]myvue.com breaks sometimes after a reload (Can't access rules of still-loading stylsheet)
Bug 1674084 R[Core:DOM: Content Processes]Let about:processes ride the trains
Bug 1635117 R[Core:DOM: Content Processes]Make about:processes localizable
Bug 1671657 R[Core:DOM: Core & HTML]setPointerCapture should do nothing if the element's node document is not active document for the pointer
Bug 1660555 A[Core:DOM: Core & HTML]AbortSignal needs to keep strong references to its followers
Bug 1673877 R[Core:DOM: Core & HTML]Perma [Tier2] TEST-UNEXPECTED-PASS | /paint-timing/first-contentful-canvas-none.html | First contentful paint should not fire for canvas type none - expected FAIL
Bug 1613521 R[Core:DOM: Editor]Assertion failure: !NeedsToDispatchBeforeInputEvent() (beforeinput event hasn't been dispatched yet), at src/editor/libeditor/EditorBase.cpp:728
Bug 1624005 R[Core:DOM: Editor]Assertion failure: mReason == WSType::text || mReason == WSType::normalWS || mReason == WSType::br || mReason == WSType::special || mReason == WSType::thisBlock || mReason == WSType::otherBlock, at /builds/worker/checkouts/gecko/editor/libeditor/WSRunObje
Bug 1673816 R[Core:DOM: Editor]DeleteNodeWithTransaction should allow non-editable node which parent is editable
Bug 1581246 R[Core:DOM: Editor]stack-overflow in [@ mozilla::HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::HandleDeleteAtOtherBlockBoundary]
Bug 1666556 R[Core:DOM: Editor]stack-overflow in [@ mozilla::HTMLEditor::AutoDeleteRangesHandler::Run]
Bug 1663725 R[Core:DOM: Editor]crash near null in [@ mozilla::AutoRangeArray::ShrinkRangesIfStartFromOrEndAfterAtomicContent]
Bug 1670933 R[Core:DOM: Navigation]Back button is not enabled by iframe navigation when Fission is enabled
Bug 1673878 R[Core:DOM: Navigation]Tab title is wrong after tab restore
Bug 1673947 R[Core:DOM: Navigation]CreatedDynamically isn't updated on parent side
Bug 1673702 R[Core:DOM: Navigation][Fission] Wrong page loaded when reloading after navigating back across an eTLD+1 boundary
Bug 1671962 R[Core:DOM: Navigation]Iframes loaded from restored session are loaded out of order when Fission enabled
Bug 1674030 R[Core:DOM: Security][wpt-sync] Sync PR 26321 - Move mixed content autoupgrade test to WPT
Bug 1674226 R[Core:DOM: Security]HTTPS-Only: Fix outdated localization on error page title
Bug 1674352 R[Core:DOM: Security]Annotate tests so we can enable mixed content auto-upgrading in Nightly
Bug 1588152 A[Core:DOM: Service Workers]Crash in [@ AsyncShutdownTimeout | profile-change-teardown | ServiceWorkerShutdownBlocker: shutting down Service Workers]
Bug 1672776 R[Core:Disability Access APIs]Crash in [@ mozilla::a11y::GeckoTextMarker::CreateAXTextMarker]
Bug 1673629 R[Core:General]Perma TEST-UNEXPECTED-ERROR | /permissions-policy/<several tests>| ReferenceError: ReportingObserver is not defined when Gecko 84 becomes Late Beta on 2020-11-28
Bug 1674175 R[Core:Graphics]Add a memory reporter for memory allocated in NativeFontResourceMac::Create
Bug 1621454 R[Core:Graphics: WebRender]Implement specialized image shaders for Software WebRender
Bug 1653649 A[Core:Graphics: WebRender]Crash in [@ webrender::render_task::render_task_sanity_check]
Bug 1673906 R[Core:Graphics: WebRender]sw-wr: Animated images are not released
Bug 1653458 R[Core:ImageLib]Fix failing Core:ImageLib mochitests with cross-origin and Fission enabled
Bug 1502355 R[Core:JavaScript Engine]Implement ReadableStream.prototype.pipeTo and pipeThrough
Bug 1674108 R[Core:JavaScript Engine]Store dense and TypedArray index in PropertyResult
Bug 1673793 R[Core:JavaScript Engine]detachArrayBuffer should accept wrapped ArrayBuffers
Bug 1663365 A[Core:JavaScript Engine]Break up jsfriendapi.h into discrete headers
Bug 1673840 R[Core:JavaScript Engine: JIT]Optimise double modulus with power of two divisor
Bug 1670496 R[Core:JavaScript: Internationalization API]Order of "fractionalSecondDigits" accesses in DateTimeFormat initialization is wrong
Bug 1645107 R[Core:JavaScript: Internationalization API]Enable fractionalSecondDigits option support in Intl.DateTimeFormat
Bug 1639153 A[Core:Javascript: WebAssembly]Optimize indirect calls
Bug 1673006 R[Core:Layout: Flexbox]Incorrect position/offset for display: table; elements inside flex with width: 100%;
Bug 1672462 R[Core:Layout: Flexbox][REGRESSION] width: auto; set on svg image acts as 100% fill, not as auto image width
Bug 1674228 R[Core:Layout: Text and Fonts]Firefox takes a long time to load emoji when emoji font is set to "Noto Color Emoji"
Bug 1674227 R[Core:Layout: Text and Fonts]Crash when using the font inspector on a getemoji.com
Bug 1665411 R[Core:Memory Allocator]Hard to explain macOS-specific use-after-free crashes
Bug 1673728 R[Core:Panning and Zooming]Add machinery to synthesize PanGestureInput events on macOS
Bug 1671331 R[Core:Panning and Zooming]turn off apz.force_disable_desktop_zooming_scrollbars on android
Bug 1674349 R[Core:Performance]Move some paint timing tests out of backlog
Bug 1673670 R[Core:String]Allow creation of nsPrintfCString from vprintf style args
Bug 1674312 R[Core:WebRTC]Perma [Bugzilla] Missing Bugzilla component: third_party/pipewire/[something]
Bug 1674463 R[Core:WebRTC: Audio/Video]The highest quality simulcast stream will cut out for approx. 3 seconds with Jitsi.
Bug 1673923 R[Core:Widget]Range thumb is drawn with the wrong rect
Bug 1607138 R[Core:XPCOM]ThreadSanitizer: data race [@ mozilla::ShutdownXPCOM] vs. [@ mozilla::ThreadEventTarget::Dispatch] on gXPCOMThreadsShutDown
Bug 1623906 R[DevTools:Inspector]Replace React props to show/hide the box model highlighter with Redux thunks
Bug 1673419 R[DevTools:Performance Tools (Profiler/Timeline)]Run performance-new node tests in the devtools node test suite
Bug 1669509 A[DevTools:Storage Inspector]Chrome indexeddb databases show up in the devtools' storage panel for a webpage
Bug 1666528 R[DevTools:Storage Inspector]Add session storage resource
Bug 1673199 R[DevTools:Style Editor]Error: Permission denied to access property "mediaText" when refreshing salvatore.js.org with devtools enabled.
Bug 1671502 A[Firefox:Address Bar]Intermittent [TV] browser/modules/test/browser/browser_UsageTelemetry_urlbar_searchmode.js | The tab-to-search result is an onboarding result. - "undefined" == "onboardTabToSearch" - JS frame :: chrome://mochitests/content/browser/browser/modules/test/bro
Bug 1672701 R[Firefox:Address Bar]Tab-to-search animation can make it look like other elements are moving
Bug 1671508 R[Firefox:Address Bar]Convert FX_URLBAR_SELECTED_RESULT_TYPE_2 and FX_URLBAR_SELECTED_RESULT_INDEX_BY_TYPE_2 into scalars
Bug 1671241 R[Firefox:Address Bar]Set aria-activedescendant upon selecting a tab-to-search result if the user's previous action wasn't typing
Bug 1672997 R[Firefox:Address Bar]Sponsored Label is not delimited from TopSite title on narrowed windows
Bug 1669710 R[Firefox:Address Bar]Rename (preview, nonPreview) searchMode to (preview, confirmed)
Bug 1664053 R[Firefox:Bookmarks & History]Show the Other Bookmarks folder in the bookmarks bar when bookmarks are stored in the Other Bookmarks folder
Bug 1674234 N[Firefox:General]Add a profiler marker for creating the skeleton UI
Bug 1673566 R[Firefox:Menus]Should use radio items instead of checkboxes in Bookmarks Toolbar visibility submenu
Bug 1674423 R[Firefox:New Tab Page]Enable on Newtab global en Pocket feed
Bug 1674437 R[Firefox:Security]ContentDispatchChooser throws if no triggering principal is passed
Bug 1667736 R[Firefox Build System:General]packed_simd does not compile on nightly Rust
Bug 1674236 R[Firefox Build System:General]Call `$(PYTHON3) mach` instead of `mach` in a few places in Makefiles
Bug 1674189 R[Firefox Build System:General]Warn the user if their PYTHONPATH is set while running mach bootstrap
Bug 1673871 R[Firefox Build System:Lint and Formatting]Perma Windows [tier2] python/mozbuild/mozbuild/test/code_analysis/test_mach_commands.py::TestStaticAnalysis::test_bug_1615884 TEST-UNEXPECTED-FAIL
Bug 1673992 R[Firefox Build System:Task Configuration]Stop extracting mozharness.zip in the current working directory
Bug 1672707 R[Toolkit:Application Update]bits_client tests fail when run locally
Bug 1661312 R[Toolkit:Performance Monitoring]In about:processes, the `browser` process should display `residentSetSize` rather than `residentUniqueSize`
Bug 1671472 R[Toolkit:Telemetry]Implement dispatcher & IPC for Timing Distributions in FOG
Bug 1578985 U[Toolkit:Video/Audio Controls]Picture-in-Picture does not remember location and size of the popout windows
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Changes to 75 bugs - 63 fixed.
1 bugs are not included due to being restricted