Bug 1700903 R[Core:Audio/Video: Playback]Don't reject slightly unsual webm files
Bug 1701089 R[Core:Audio/Video: Playback]vp09 codec string fails when parsing Widevine manifest
Bug 1701248 R[Core:CSS Transitions and Animations]Add WPT for animating object-position
Bug 1699533 R[Core:Canvas: 2D]fairly reproducible canvas-y crashes on https://lab.hakim.se/hypnos/
Bug 1647433 R[Core:DOM: Content Processes]Fix use of GetTopLevelContentDocument in HangMonitorChild::InterruptCallback
Bug 1692639 N[Core:DOM: Navigation]Change dom/broadcastchannel/tests/test_bfcache.html to use BroadcastChannel
Bug 1689684 R[Core:DOM: Navigation]Ensure docshell/test/browser/browser_bug1347823.js works with SHIP-BFCache
Bug 1689664 R[Core:DOM: Navigation]Ensure docshell/test/navigation/test_performance_navigation.html works with SHIP-BFCache
Bug 1698449 R[Core:DOM: Security]Try to not create a resource: URI browser window using a SystemPrincipal
Bug 1700029 R[Core:DOM: UI Events & Focus Handling]Clean up MaybeShowOnScreenKeyboard
Bug 1694238 N[Core:DOM: UI Events & Focus Handling]Intermittent mozilla/tests/focus/focus-next-tick-before-iframe-loaded-different-site.html | Check result - assert_equals: Check verdict expected "PASS" but got "FAIL missing onfocus"
Bug 1681368 N[Core:DOM: UI Events & Focus Handling]Intermittent dom/events/test/test_focus_blur_on_click_in_deep_cross_origin_iframe.html | Test timed out.
Bug 1492259 N[Core:Disability Access APIs]Intermittent accessible/tests/browser/events/browser_test_focus_urlbar.js | Test timed out -
Bug 1700726 R[Core:Fuzzing]Fuzzing coverage build is missing llvm-symbolizer
Bug 1701125 R[Core:GFX: Color Management]Remove the Option<> from build_lut_matrix.
Bug 1699224 A[Core:Graphics: WebRender]Support remapping shared surfaces when there is virtual memory pressure
Bug 1700642 R[Core:Graphics: WebRender]Add paint phase times graph to WR profiler
Bug 1701231 R[Core:Graphics: WebRender]Remove non-x86 shipping restrictions on WebRender
Bug 1701037 R[Core:Internationalization]map 'encoding-detection' web-platform-test folder to 'Core :: Internationalization' component in Bugzilla
Bug 1470081 R[Core:JavaScript Engine]Ban GetterOp/SetterOp from PropertyDescriptor
Bug 1699496 R[Core:JavaScript Engine]Don't call GetNativeStackBase when creating helper thread contexts
Bug 1700954 R[Core:JavaScript Engine]Remove remaining references to BinAST from dom::ScriptLoader
Bug 1700990 R[Core:JavaScript Engine: JIT]Fix frame descriptor for the entry frame
Bug 1700900 R[Core:Javascript: WebAssembly]js shell: improve propagation of wasm-specific command line arguments to child processes
Bug 1676441 R[Core:Javascript: WebAssembly]Allow Wasm memories to grow past 2GB on 64-bit systems
Bug 1700948 R[Core:Javascript: WebAssembly]Also run all wasm tests explicitly with `--wasm-compiler=ion`
Bug 1700490 R[Core:Layout: Text and Fonts]Percentage text-decoration-thickness values are resolved against the used font size instead of computed
Bug 1694123 N[Core:Layout: Text and Fonts]The font will fallback to Segoe UI with src:local() when the platform font list is reinitialized
Bug 1433500 N[Core:Networking]detectportal.firefox.com should return something informative for "real" user agents.
Bug 1700824 R[Core:Networking: HTTP]Remove or update probes expiring in Firefox 90: NETWORK_BACK_PRESSURE_SUSPENSION_*
Bug 1700309 R[Core:Networking: WebSockets]Firefox can’t establish a connection to the server at wss://analysis.chess.com/.
Bug 1700051 N[Core:Spelling checker]Reduce accessbility of `mozInlineSpellStatus`'s members
Bug 1701346 A[Core:Storage: Quota Manager]Revert QM_OR_ELSE_WARN to ordinary orElse in places where NS_ERROR_FILE_ALREADY_EXISTS/NS_ERROR_FILE_NOT_FOUND/NS_ERROR_FILE_TARGET_DOES_NOT_EXIST needs to be just ignored
Bug 1701344 R[Core:Web Painting]change diagnostic assert in GetClipWithRespectToASR back to a debug assert
Bug 1701107 R[Core:Widget: Cocoa]Enable toolbar shifting for macOS <11
Bug 1700713 R[Core:Widget: Cocoa]No icons next to New Container Tab menu items in native menus
Bug 1695921 R[Core:Widget: Cocoa]Rename OSXLionFullscreen to macOSNativeFullscreen
Bug 1699117 R[DevTools:Console]Intermittent TV devtools/client/webconsole/test/browser/browser_console.js | leaked 2 window(s) until shutdown [url = http://example.com/browser/devtools/client/webconsole/test/browser/test-console.html?1615977603966]
Bug 1699208 R[DevTools:Console]Intermittent devtools/client/webconsole/test/browser/browser_console.js | Test timed out -
Bug 1691579 R[DevTools:General]Fix and re-enable devtools/client/shared/test/browser_spectrum.js test for Fission
Bug 1449754 N[DevTools:Inspector]Intermittent devtools/client/inspector/test/browser_inspector_highlighter-rulers_03.js | Dimension text was created successfully - Got A, expected B
Bug 1666529 A[DevTools:Storage Inspector]Add cookie storage resource
Bug 1685268 R[DevTools:Style Editor]Enable STYLESHEET resource type by default
Bug 1700449 R[Firefox:Address Bar]Intermittent browser/components/urlbar/tests/browser/browser_quicksuggest.js | Uncaught exception - at resource://testing-common/NimbusTestUtils.jsm:103 - Error: Manager store not ready, call `manager.onStartup`
Bug 1700971 R[Firefox:Address Bar]Switch to search engine extensions and use random port numbers in urlbar xpcshell-tests
Bug 1679826 R[Firefox:Enterprise Policies]Allow controlling individual extension update via policy
Bug 1701202 R[Firefox:General]Fix some browser mochitests so we can enable proton on nightly
Bug 1701257 R[Firefox:Menus]Fix border radius on webextension panels to ensure browser_ext_popup_corners.js passes with browser.proton.enabled set
Bug 1699399 R[Firefox:Menus]Unreadable <select> fields (menulist / popups) when using the Proton dark theme
Bug 1701049 R[Firefox:Messaging System]DRM panel "Manage Settings" button should be in sentence case
Bug 1701201 R[Firefox:Messaging System]Missing test cleanup causes side-effects after run on about:welcome
Bug 1699700 R[Firefox:Nimbus Desktop Client]Prototype remote defaults for aboutwelcome feature
Bug 1699761 R[Firefox:Nimbus Desktop Client]about:studies page is blank
Bug 1699202 R[Firefox:Pocket]Add probes for Learn More and View List in STP
Bug 1692018 A[Firefox:Search]Remove support for installing OpenSearch engines via ftp
Bug 1700719 R[Firefox:Session Restore]Crash in [@ mozilla::dom::CanonicalBrowsingContext::RequestRestoreTabContent]
Bug 1572084 R[Firefox:Session Restore]SessionStoreListener code tries to read layout and form data for windows loaded in a different child process
Bug 1701053 R[Firefox:Site Permissions]Learn more links in Permission Panels should have an underline text decoration
Bug 1692303 R[Firefox:Tabbed Browser]Flip the default value of the browser.ctrlTab.recentlyUsedOrder pref to false, and also change it for people who haven't used Ctrl-Tab.
Bug 1698192 R[Firefox:Tabbed Browser]Accessing currentURI of a lazy browser while the browser is swapped corrupts the cached currentURI
Bug 1701003 R[Firefox:Tabbed Browser]Move Proton Tabs to the general Proton pref
Bug 1699841 R[Firefox:Tabbed Browser][Proton] [zh-TW] Display font size too small for localized audio indicator text, leading low legibility
Bug 1701256 R[Firefox:Theme]Remove 'Dark' and 'Light' themes and replace them with 'Proton Light' and 'Proton Dark'
Bug 1697448 R[Firefox:Theme]Active tab of some lightweight themes are too faint with Proton enabled
Bug 1700989 R[Firefox:Theme]The favicon is blank for a couple seconds if the audio stops playing while the mouse is in the tab bar
Bug 1700873 R[Firefox:Theme][win7] White/Dark line covering the buttons over the tab bar when Dark/Light theme is used an browser is unfocussed
Bug 1701249 R[Firefox:Toolbars and Customization][Nightly] UI Bug in Tab Bar (3/26 Update)
Bug 1700419 R[Firefox Build System:Mach Core]Remove py2commands logic from mach driver
Bug 1699757 R[Firefox Build System:Task Configuration]Run telemetry-tests-client against Python 3 in CI
Bug 1696538 R[Firefox Build System:Task Configuration]Run firefox-ui tests against Python 3 in CI
Bug 1701137 A[Firefox Build System:Task Configuration]Perma Sentry [Tier2] error: API request failed
Bug 1696041 R[Firefox Build System:Task Configuration]Investigate removing `fission-run-on-projects` and `webrender-run-on-projects`
Bug 1700917 V[GeckoView:General]Perma Android xpcshell unexpected passes when Gecko 89 merges to Beta on 2021-04-19
Bug 1689240 R[Toolkit:Add-ons Manager]Clean-up load/shutdown/render functions in view-controller.js and aboutaddons.js
Bug 1698169 R[Toolkit:Application Update]Ensure exclusive read access to the callback when updating from a background task on Windows
Bug 1699245 R[Toolkit:Notifications and Alerts]Right align modal buttons
Bug 1697771 R[Toolkit:Password Manager]Perma Fission toolkit/components/passwordmgr/test/mochitest/test_autocomplete_https_downgrade.html | Checking form-basic username is: name1 - "" == "name1" - got "", expected "name1" (operator ==)
Bug 1685406 R[Toolkit:Telemetry]Implement the proposed Glean Interface for Firefox Telemetry (GIFFT)
Bug 1700982 R[Toolkit:Telemetry]Update Python dependency requirements for telemetry-tests-client harness
Bug 1694285 R[Toolkit:Themes]Proton: Ensure it's clear where arrow panels that open automatically are anchored to
Bug 1674152 R[Toolkit:Video/Audio Controls]Make Picture-in-Picture code emit interface documentation via SphinxJS
Bug 1701046 R[WebExtensions:Frontend]Add-on install confirmation panel string should end with a period
Bug 1701048 R[WebExtensions:Frontend]Add-on install confirmation panel string should refer to "add-ons" and not "extensions"
Bug 1695346 R[WebExtensions:General]Discarded hidden tab's URL is "about:blank" after moving the tab to a new window
Bug 1643176 R[WebExtensions:General]runtime.sendMessage(badid, msg) = Error: can't access property "wakeupBackground", extension is undefined
Bug 1700762 R[WebExtensions:General]extension pages cannot load subresources in a sandboxed iframe
###########
Changes to 86 bugs - 72 fixed.
3 bugs are not included due to being restricted