Bug 1685621 R[Core:CSS Parsing and Computation]Fix serialization of complex :not to have commas in selector lists
Bug 1684909 N[Core:CSS Parsing and Computation]Implement most of the remaining bits of image-set().
Bug 1674214 R[Core:DOM: Content Processes]Track FX_NUMBER_OF_UNIQUE_SITE_ORIGINS high water mark for Linux users
Bug 1645696 R[Core:DOM: Device Interfaces]Intermittent SUMMARY: ThreadSanitizer: data race /builds/worker/checkouts/gecko/netwerk/protocol/http/nsHttpHandler.cpp:1975:27 in mozilla::net::nsHttpHandler::PrefsChanged(char const*)
Bug 1676490 R[Core:DOM: File]Fix some confusing `NS_WARN_IF` usage in BlobURLProtocolHandler
Bug 1685580 R[Core:DOM: Security]Perma [tier2] /builds/worker/checkouts/gecko/dom/security/nsContentSecurityUtils.cpp:1132:11: error: unknown type name 'LoadInfo'; did you mean 'mozilla::net::LoadInfo'?
Bug 1665944 R[Core:DOM: Selection]Multi-paragraph text selection is broken on Notion
Bug 1685303 N[Core:DOM: Selection]Fortify code around `AccessibleCaretManager::OnSelectionChanged`
Bug 1685577 R[Core:DOM: UI Events & Focus Handling]Disable dom.input_events.canSuspendInBCG.enabled for now
Bug 1685356 R[Core:Graphics: Layers]Intermittent org.mozilla.geckoview.test.ScreenshotTest.capturePixelsCompletesCompositorPausedRestarted | application crashed [@ mozilla::layers::CompositorOGL::Initialize(nsTString<char>*)]
Bug 1685564 R[Core:Graphics: WebRender]The texture cache textures are too small because of broken "Main window" detection
Bug 1678326 R[Core:Graphics: WebRender]Add a pref to force invalidation of picture tiles every frame
Bug 1640960 A[Core:Graphics: WebRender]Stop using instancing in WebRender
Bug 1673497 N[Core:JavaScript Engine: JIT]Warp: Eliminate bailout loops
Bug 1682767 A[Core:JavaScript Engine: JIT]Remove IonBuilder and TI, part deux
Bug 1684085 A[Core:JavaScript Engine: JIT]Incorrect truncation for Math.ceil(a/b) | 0
Bug 1685132 R[Core:JavaScript: GC]Simplify tracing by removing the special case for tenuring in TraceEdgeInternal
Bug 1685481 R[Core:JavaScript: Internationalization API]Update to tzdata2020f
Bug 1685078 R[Core:Layout: Generated Content, Lists, and Counters]Support full <image> syntax in list-style-image as per spec.
Bug 1685636 R[Core:Layout: Text and Fonts]Intermittent /css/css-text/word-break/word-break-break-all-007.html | Testing http://web-platform.test:8000/css/css-text/word-break/word-break-break-all-007.html == http://web-platform.test:8000/css/css-text/word-break/reference/word-brea
Bug 1682948 N[Core:Networking]ThreadSanitizer: data race [@ CacheEntry::GetSecurityInfo] vs. [@ CacheEntry::GetIsForcedValid]
Bug 1685218 R[Core:Panning and Zooming]Enable browser_test_scrolling_in_extension_popup_window.js on Mac
Bug 1685009 N[Core:Panning and Zooming]Assertion failure: IsRootContent() || relativeOffset == CSSPoint(), at src/gfx/layers/FrameMetrics.cpp:132
Bug 1685306 R[Core:Privacy: Anti-Tracking]Enable dFPI MVP UI by default
Bug 1683525 R[Core:Security: PSM]SEC_ERROR_REVOKED_CERTIFICATE on hetzner.com due to security.pki.crlite_mode=2 (Nightly default)
Bug 1683417 A[Core:WebRTC: Networking]ThreadSanitizer: data race [@DataChannelConnection::SetSignals] vs. [@ DataChannelConnection::SetReadyState]
Bug 1685788 R[Core:Widget: Cocoa]Update supported platform docs to include macOS ARM64
Bug 1664670 R[Core:Widget: Cocoa]tooltips cut off on second (non-retina) screen
Bug 1685537 R[Core:Widget: Gtk][Wayland] Don't draw invisible windows
Bug 1683404 A[Core:XPCOM]ThreadSanitizer: data race [@ nsTimerImpl::Shutdown] vs. [@ nsTimerImpl::CancelImpl]
Bug 1684641 R[Core:XPCOM]gtk3drawing.cpp: do not use 'else' after 'return'
Bug 1685095 R[Data Platform and Tools:Glean: SDK]New Glean release & merge into m-c with updated crossbeam-channel
Bug 1439963 R[DevTools:Console]console.log and output formatter return promises in different orders cross-browser
Bug 1685647 R[DevTools:Inspector: Compatibility]Update MDN compat data (2021 Jan 2nd week)
Bug 1685408 R[DevTools:JSON Viewer]Re-enable devtools/client/jsonview/test/browser_jsonview_save_json.js test for Fission
Bug 1628936 R[DevTools:Storage Inspector]The devools storage inspector does not show isolated cookies when dfpi is active
Bug 1684006 R[Firefox:File Handling]Intermittent uriloader/exthandler/tests/mochitest/browser_extension_correction.js | Downloaded file should also match file_as.exe - Got "file_as(1).exe", expected "file_as.exe"
Bug 1683286 R[Firefox:Messaging System]ExperimentAPI should read the collection name from prefs
Bug 1684887 R[Firefox:New Tab Page]The "Sponsored stories" checkbox is wrongly displayed in the Customization panel in Regions where it shouldn't
Bug 1685310 R[Firefox:New Tab Page]Update Baidu top site icon to the new Baidu version
Bug 1682055 R[Firefox:New Tab Page]Some parts of the customize section are not accessible.
Bug 1685133 R[Firefox:New Tab Page]String changes due newtab updates
Bug 1683950 R[Firefox:Protections UI]Add more milestones to the celebration toast
Bug 1684171 R[Firefox:Protections UI]Tracker celebration text should use long format of month to match the toast and improve readability
Bug 1666840 R[Firefox:Search]Move invalid-engine.xml to the OpenSearch test sub-directory
Bug 1683188 N[Firefox:Tabbed Browser]Perma-checkerboarding and broken paints after tab switching, sometimes (with Ctrl+Tab); fixed by another tab switch
Bug 1650675 R[Firefox:about:logins]Login CSV import summary dialog
Bug 1684348 R[Firefox Build System:Bootstrap Configuration]mac bootstrap fails when calling brew cask list
Bug 1680630 R[Firefox Build System:Bootstrap Configuration]|mach boostrap --no-system-changes| fails with AttributeError: 'OSXBootstrapper' object has no attribute 'package_manager'
Bug 1680802 R[Firefox Build System:Bootstrap Configuration]|mach create-mach-environment| "assert len(base_version) == 2"
Bug 1684914 R[Firefox Build System:General]Don't attempt to use thin LTO with gcc
Bug 1685760 R[Firefox Build System:Source Code Analysis]For `non-unified` make the test task tier 1
Bug 1685599 R[Firefox Build System:Toolchains]Improve clang-macosx-cross toolchain build
Bug 1685390 R[GeckoView:General]Apilint fails with KeyError: 'error' if api version is out of date
Bug 1607588 R[NSS:Libraries]ThreadSanitizer: data race [@ nssSlot_GetToken] vs. [@ nssToken_Destroy] with potential use-after-free during shutdown
Bug 1681992 R[Toolkit:Crash Reporting]Write a test to ensure that the about:tabcrashed page count book-keeping works
Bug 1649617 A[Toolkit:OS.File]ClientID.jsm imports OS.File during startup
Bug 1649613 R[Toolkit:OS.File]Sqlite.jsm imports OS.File during startup
Bug 1683911 R[Toolkit:OS.File]Make osfile.reset_worker_delay consistent across branches
Bug 1685571 R[Toolkit:Reader Mode]Update readability to v0.4 from node/git
Bug 1685703 R[Toolkit:Startup and Profile System]31.19 - 36.6% tp5n main_startup_fileio (windows10-64-shippable, windows10-64-shippable-qr) regression on push 7dc6ee63d69a011e7fafd515c26184b9b1f390c0 (Tue January 5 2021)
Bug 1664533 R[Toolkit:Startup and Profile System]nsAppStartup::TrackStartupCrashEnd() causes hangs at the end of startup by removing a file on the main thread
Bug 1685628 R[Toolkit:Themes]Fix common.css radio button hover styles to be consistent with checkboxes
###########
Changes to 69 bugs - 54 fixed.
4 bugs are not included due to being restricted