Bug 1722782 R[Core:Canvas: WebGL]`TypeError: can't access property "UNMASKED_RENDERER_WEBGL"` when trying to play cultureamp.com video
Bug 1709832 R[Core:DOM: Copy & Paste and Drag & Drop]dragenter event incorrectly fires on Text nodes (should be Element nodes only)
Bug 1722820 R[Core:DOM: Core & HTML]Geolocation API's watchPosition() should return 0 on error to align with other browsers
Bug 1722396 N[Core:Disability Access APIs]Refactor DOM attribute change handling
Bug 1718210 R[Core:Graphics]GPU process shutdown hang during testing on Windows / Debug builds
Bug 1720169 R[Core:Graphics][Bug]: Weird rendering on android 5 (Adreno 4xx)
Bug 1718329 R[Core:Graphics: WebRender]Crash in [@ mozilla::wr::RenderCompositorD3D11SWGL::TileD3D11::Map]
Bug 1719232 R[Core:Graphics: WebRender]Crash in [@ <webrender::compositor::sw_compositor::SwCompositor as webrender::composite::Compositor>::bind] in distro build
Bug 1721795 R[Core:Graphics: WebRender]Buttons drawn with a diagonal artifact, rounded corners are missing [Adreno 3xx]
Bug 1722838 R[Core:Graphics: WebRender]Add DisplayListPayload struct
Bug 1672317 R[Core:Internationalization: Localization]Introduce L10nFileSource
Bug 1722453 R[Core:JavaScript Engine]Remove remaining private slot uses outside the JS engine
Bug 1722674 R[Core:JavaScript Engine]Stop using a private slot for TypedArray and DataView data
Bug 1722560 R[Core:JavaScript Engine]Error message detail with cross-compartment wrapper gives object class name as "Proxy"
Bug 1720317 R[Core:Layout]Perma esr91 OSX R-swr TEST-UNEXPECTED-PASS | async-scrolling/offscreen-clipped-blendmode-1.html == async-scrolling/offscreen-clipped-blendmode-ref.html | image comparison, max difference: 0, number of differing pixels: 0 + other failures
Bug 1720316 R[Core:Layout: Positioned]Perma esr91 OSX R-swr TEST-UNEXPECTED-PASS | abs-pos/select-3.html == abs-pos/select-3-ref.html | image comparison, max difference: 0, number of differing pixels: 0
Bug 1720746 R[Core:MFBT]Assertion failures on RandomNum.cpp on Windows 10 2004 asan mochitest-media jobs
Bug 1721858 R[Core:Networking: WebSockets]Enable WebSocket connection partitioning if first party isolation is enabled
Bug 1720294 R[Core:Privacy: Anti-Tracking]Ignoring referrer policies 'unsafe-url', 'no-referrer-when-downgrade' and 'origin-when-cross-origin'
Bug 1722908 R[Core:Widget: Android]Geckoview example crashes on about:support with widget.non-native-theme.use-theme-accent set true
Bug 1722718 R[Core:XPConnect]Allow Javascript code to print to stderr
Bug 1722754 R[Core:XPConnect]Migrate Script Security and Xray Documentation In-Tree
Bug 1722801 R[DevTools:Console]test_webconsole-node-grip.html fails with server targets
Bug 1722800 R[DevTools:General]A few mochitest chrome tests fail with server targets
Bug 1721109 R[DevTools:Performance Tools (Profiler/Timeline)]Preparations for profiler-get-symbols update
Bug 1722462 R[DevTools:Responsive Design Mode]browser_device_change.js (and many other RDM tests) fail with server targets
Bug 1721887 R[Firefox:Bookmarks & History]Allow Snapshots to be created without a corresponding Interaction
Bug 1722275 R[Firefox:General]Add a framework for collecting page data from open documents.
Bug 1713812 R[Firefox:Nimbus Desktop Client]Remove NimbusFeature.getValue and convert all usages to getAllVariables
Bug 1722265 R[Firefox:Nimbus Desktop Client]Add NimbusFeatures::OnUpdate() support for a user data callback pointer
Bug 1721239 R[Firefox:Pocket]Put newtab story collections behind a feature flag
Bug 1722739 R[Firefox:Pocket]Newtab Pocket topics section privacy link doesn't underline on hover
Bug 1721651 R[Firefox:Security]Display warning triangle as the favicon of certificate error pages
Bug 1722655 R[Firefox:Toolbars and Customization]Missing reload icon when the button is moved to customize main list or in overflow
Bug 1722439 R[Firefox Build System:Bootstrap Configuration]Bootstrap wasi-sysroot via configure
Bug 1722442 R[Firefox Build System:General]--with-system-* and bootstrap not handled correctly after bug 1721514
Bug 1722960 R[Firefox Build System:General]locate_java_bin_path returns path without /bin suffix on macOS since bug 1722492
Bug 1722653 R[Firefox Build System:General]Remove --enable-system-cairo
Bug 1717645 A[Firefox Build System:Mach Core]Virtualenv "up-to-date" logic is not resilient to setup failures
Bug 1720215 A[Firefox Build System:Mach Core]Remove MACOSX_DEPLOYMENT_TARGET virtualenv workaround
Bug 1717051 A[Firefox Build System:Mach Core]Transparently manage Mach virtualenv at run-time
Bug 1722724 R[Firefox Build System:Source Code Analysis]Improve static analysis docs for isExpansionInMainFile()
Bug 1722438 R[Firefox Build System:Toolchains]Add support for wasm32-wasi targets in clang toolchains for mac and windows.
Bug 1710356 R[Remote Protocol:Agent]Don't hard-code product name as Firefox in "Browser.getVersion"
Bug 1720676 A[Remote Protocol:Agent]Don't run Remote Agent specific code when --remote-debugging-port hasn't been specified
Bug 1722745 R[Toolkit:Places]Fix an interactionsViewer race condition
Bug 1722680 R[Toolkit:Places]Store and retrieve pagedata for snapshots
Bug 1681941 A[Toolkit:Printing]Tooltips on sheet indicator buttons are not shown for the second hover action if the sheet indicator focus is not removed
Bug 1720491 R[Toolkit:Telemetry]FOG pytests should use run_glean_parser directly in its tests
Bug 1722799 R[Toolkit:Themes]UITour highlight appears as a solid color rectangle instead of a translucent highlight
Bug 1722749 R[WebExtensions:Developer Tools]browser_ext_devtools_inspectedWindow_targetSwitch.js fails with server targets
Bug 1722966 N[WebExtensions:General]Cannot install manifest v2 extension with host_permissions or action key in manifest file
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Changes to 55 bugs - 46 fixed.
2 bugs are not included due to being restricted