Bug 1685215 R[Core:Audio/Video: Playback]Move `AdjustForStartTime()` out from `MediaData`
Bug 1684909 R[Core:CSS Parsing and Computation]Implement most of the remaining bits of image-set().
Bug 1681664 R[Core:DOM: Core & HTML]Dynamically importing slow modules causes the tab to hang
Bug 1221868 R[Core:DOM: Core & HTML]"ASSERTION: How did we get a child with a current doc?" with createShadowRoot
Bug 1670233 R[Core:DOM: Core & HTML]Intermittent dom/base/test/useractivation/test_clipboard_editor.html | Timed out while polling clipboard for requested data, got: waitForClipboard-known-value-0.5170680238228297
Bug 1663506 A[Core:DOM: Editor]Intermittent browser/base/content/test/outOfProcess/browser_controller.js | step 0 selected undo - Got false, expected true
Bug 1685161 R[Core:DOM: HTML Parser]Use consistent namespace in nsHtml5TreeBuilderCppSupplement.h
Bug 1679856 V[Core:DOM: Navigation]Fix and enable browser/components/sessionstore/test/browser_crashedTabs.js for Fission
Bug 1671179 A[Core:DOM: Navigation]Look into tests that fail with xorigin because of using window.location.href
Bug 1685869 R[Core:DOM: Networking]Perma UNEXPECTED-PASS | dom/xhr/tests/test_sync_xhr_event_handling.html | fail-if condition in manifest - We expected at least one failure | browser_sync_xhr_event_handing_switch_bcg.js | We expect at least one when Gecko 86 merges to Beta on 2021-01-25
Bug 1685303 N[Core:DOM: Selection]Fortify code around `AccessibleCaretManager::OnSelectionChanged`
Bug 1685623 R[Core:Disability Access APIs]Perma accessible/tests/browser/mac/browser_app.js | Context menu on link contains fourteen items - Got 15, expected 14
Bug 1682865 R[Core:Disability Access APIs]In combo edit fields, we don't expose text and popup properties to VoiceOver correctly.
Bug 1685939 R[Core:Gecko Profiler]Fix AUTO_PROFILER_STATS(ChromeUtils::AddProfilerMarker)
Bug 1672582 R[Core:Graphics]Remove or update probes expiring in Firefox 85: gfx.canvas.remote.deactivated_*
Bug 1683471 N[Core:Graphics: WebGPU]Permafailing [wgpu] error: failed to push some refs to 'https://_SANITIZED_@github.com/moz-gfx/wgpu'
Bug 1685046 N[Core:Graphics: WebRender]macOS Crash in [@ mozilla::wr::RenderCompositorNativeOGL::Bind]
Bug 1684817 R[Core:Graphics: WebRender]Laggy scrolling on duellinksmeta.com
Bug 1684812 R[Core:Graphics: WebRender]Unreported heap-unclassified memory for "webrender::lru_cache::LRUCache
Bug 1685804 N[Core:Internationalization]Use nsIGSettingsService in OSPreferences_gtk
Bug 1685684 V[Core:JavaScript Engine]Assertion failure: !env->hasUncacheableProto(), at jit/CacheIR.cpp:2821 with evalcx
Bug 1685958 R[Core:JavaScript Engine]Add high-level SpiderMonkey documentation in-tree
Bug 1684085 R[Core:JavaScript Engine: JIT]Incorrect truncation for Math.ceil(a/b) | 0
Bug 1673497 R[Core:JavaScript Engine: JIT]Warp: Eliminate bailout loops
Bug 1671225 R[Core:JavaScript Engine: JIT]Out of Date Comment refers to SideCannon, which no longer exists
Bug 1685616 R[Core:JavaScript Engine: JIT]Add warp generator and async flags to fuzz-flags.txt
Bug 1682767 A[Core:JavaScript Engine: JIT]Remove IonBuilder and TI, part deux
Bug 1682623 R[Core:JavaScript Engine: JIT]Enable Warp Compiled Generators and Async Functions
Bug 1685290 V[Core:JavaScript Engine: JIT]Assertion failure: script->hasIonScript(), at jit/Ion.cpp:2685 with invalidate
Bug 1685738 R[Core:JavaScript Engine: JIT]Remove no longer used non-boxed output code in CacheIRCompiler
Bug 1686021 N[Core:JavaScript: GC]Simplify ShouldMark predicate a little
Bug 1638764 R[Core:JavaScript: GC]Intermittent AddressSanitizer: SEGV /build/glibc-6V9RKT/glibc-2.19/string/../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S:131
Bug 1686020 N[Core:JavaScript: GC]Don't disable the nursery when creating the self hosting zone
Bug 1685434 R[Core:Layout: Text and Fonts]Emoji won’t be displayed with monochrome fonts even if explicitly requested
Bug 1626997 R[Core:Networking]Enable <link rel=preload> support by default
Bug 1682197 R[Core:Panning and Zooming][non WebRender] OOP iframe contents gets incorrectly minus offset-ed without layerization on Fission
Bug 1682200 R[Core:Panning and Zooming]hit testing fails on OOP iframe contents with desktop zooming
Bug 1685829 R[Core:Panning and Zooming]Migrate some APZ tests to async/await style
Bug 1685837 R[Core:Panning and Zooming]ThreadSanitizer: data race [@ mozilla::layers::AsyncPanZoomController::SetState] vs. [@ IsAsyncZooming]
Bug 1669905 A[Core:Printing: Output]Support "2" and "6" as values for pages-per-sheet
Bug 1681344 R[Core:Printing: Setup]Eliminate the storage of a PMPageFormat in prefs
Bug 1685607 R[Core:SVG]Intermittent [tier2] svg/svg-integration/clip-path/clip-path-ellipse-X == svg/svg-integration/clip-path/clip-path-ellipse-Y-ref.html | image comparison, max difference: 36, number of differing pixels: 1162
Bug 488702 R[Core:SVG]Invalidation of containers is broken if the container or a descendant is filtered
Bug 1685298 R[Core:Storage: Cache API]Perma build bustage dom/cache/FileUtilsImpl.h:90:10: error: variable 'rv' is uninitialized when used here [-Werror,-Wuninitialized] when Gecko 86 merges to Beta on 2021-01-25
Bug 1679541 R[Core:Storage: Quota Manager]Change GetDirectoryMetadata2 to return mozilla::Result
Bug 1685055 N[Core:Widget: Gtk][Wayland] Crashes with src/wayland-client.c:230: wl_proxy_unref: Assertion `proxy->refcount > 0' failed.
Bug 1685090 R[DevTools:Debugger]Breakpoints added in the browser toolbox do not apply until after a restart
Bug 1605107 R[DevTools:Framework]Intermittent devtools/client/framework/browser-toolbox/test/browser_browser_toolbox_fission_inspector.js | Test timed out -
Bug 1685257 R[DevTools:General]Remove unused root actor trait allowChromeProcess
Bug 1684595 R[DevTools:Inspector]Delegate toggling CSSGridHighlighter from swatches in the Rules view
Bug 1551569 R[DevTools:Inspector: Rules][Inactive CSS] Display a warning when margin or padding is set on internal table elements.
Bug 1681893 R[DevTools:Shared Components]Remove defer usage in devtools/server/tests/xpcshell/head_dbg.js
Bug 1685753 R[Firefox:Downloads Panel]Remove level="top" from the downloads panel
Bug 1680637 A[Firefox:General]Implement tabmodal alert/confirm/prompt dialogs to use SubDialog instead of TabModalPrompt
Bug 1682395 A[Firefox:General]Add vertical centering for new tabmodal implementation
Bug 1660848 N[Firefox:Menus]Add a "check for updates..." option to application menus.
Bug 1685978 R[Firefox:Messaging System]Land strings for What's New Panel content in Firefox 85
Bug 1678793 R[Firefox:New Tab Page]Firefox branding on New Tab page is too big
Bug 1685134 R[Firefox:Normandy Client]unenrollment normandy test with dummy pref
Bug 1685858 R[Firefox:Preferences]Misused characters test doesn't detect apostrophe at the beginning of text
Bug 1683188 R[Firefox:Tabbed Browser]Perma-checkerboarding and broken paints after tab switching, sometimes (with Ctrl+Tab); fixed by another tab switch
Bug 1685811 R[Firefox Build System:Bootstrap Configuration]One-line bootstrap described in docs fails while expecting user input
Bug 1685758 R[Firefox Build System:General]Increase stack size on win32 debug
Bug 1683213 R[Firefox Build System:Source Code Analysis]Should we disable "-Wrange-loop-analysis"?
Bug 1685854 R[Firefox Build System:Toolchains]Perma OSX Ccov make[4]: *** [/builds/worker/checkouts/gecko/config/rules.mk:545: libmozavutil.dylib] Error 1 | ld: symbol(s) not found for architecture x86_64
Bug 1686100 R[GeckoView:General]Route Service.onTrimMemory notifications through to Gecko's memory pressure observer
Bug 1649617 R[Toolkit:OS.File]ClientID.jsm imports OS.File during startup
Bug 1649610 N[Toolkit:OS.File]SharedDataMap.jsm imports OS.File during startup
Bug 1682079 R[Toolkit:Printing]Move browser/ references to toolkit/
Bug 1205985 N[Toolkit:Telemetry]Add Telemetry measurement for the time Firefox was open and the computer not in sleep
Bug 1681731 R[Toolkit:Telemetry]FOG must register its custom pings
Bug 1686033 R[Toolkit:Telemetry]Telemetry Mentored Bug Template needs a little updating
Bug 1682165 R[Toolkit:Telemetry]Intermittent mozmake.EXE[1]: *** [force-cargo-test-run] Error 101 | thread 'private::string::test::string_ipc' panicked at 'Cannot get test value for string metric in non-parent process!'
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Changes to 75 bugs - 55 fixed.
5 bugs are not included due to being restricted