Highlights

• Dao added a new Eyedropper quick action! Check it out by typing “color” or “eyedropper” in the URL bar (Bug 1803575) on Nightly.

• Henrik Skupin released geckodriver 0.37.0, which includes support for several new APIs and various bug fixes. See the release page for details.
• Starting from Firefox 153, access to local file: URLs is being restricted by default.
  • Extensions now require an explicit “Access local files on your computer” permission, separate from broad host permissions, that users must grant.
  • Extensions can call the extension.isAllowedFileSchemeAccess() API to determine whether they have been granted access to file: URLs (Bug 2034168).

Friends of the Firefox team

Resolved bugs (excluding employees)

Script to find new contributors from bug list

Volunteers that fixed more than one bug

• :Vincent
• Chris Vander Linden
• DrSeed
• Khalid AlHaddad
• Sam Johnson

New contributors (🌟 = first patch)

• Francis :mckenfra: tld service for webextensions
• any1here: about:preferences#privacy is broken with MOZ_DATA_REPORTING false
• pullmana8: Fix protocol/Actor.js to throw an Error instead of an Actor
• RAN1: Firefox Crashes on Quit When Running Two Browsers With Separate Profiles

Project Updates

Accessibility

• Morgan added a new accessibility-specific, front-end review skill to mozilla central! 🎉 You can read about it, and learn how to use it in the accessibility review source docs.

Add-ons / Web Extensions

Addon Manager & about:addons

• Migrated addon-page-header and addon-card action buttons to the reusable moz-button web component as part of the ongoing Nova restyling of about:addons – Bug 2042200 / Bug 2042204
• Extended moz-page-nav-button with a forwarded title property to fix an accessibility issue where the component lacked a label in collapsed state; Landed in Firefox 153, and uplifted to Firefox 152 for about:settings which was already riding the 152 release train – Bug 2040971
• Fixed a shutdown-timing bug where a pending GMP update-check timer could fire after XPCOMShutdownThreads started, causing a pref write assertion; Fixed in Firefox 153 – Bug 2043803

WebExtensions Framework

• Fixed MV2 content scripts incorrectly injecting into guarded hosts because MozDocumentMatcher::MatchesURI was not consulting CheckGuarded when mCheckPermissions was false; Fixed in Firefox 153 – Bug 2041393
• Added support for accessing ObservableArray attributes (such as adoptedStyleSheets) from XrayWrappers and extension content scripts, unblocking extensions that rely on this Web API; Fixed in Firefox 153 – Bug 1751346
• Wired runtime_blocked_hosts and runtime_allowed_hosts enterprise policy settings through ExtensionSettings to allow administrators to restrict extension host permissions on managed devices, starting in Firefox 153 – Bug 1805205
  • Thanks to Mike Kaply for implementing this enterprise policy enhancement.

WebExtension APIs

• Fixed promiseTabWhenReady blocking indefinitely on discarded tabs, preventing cleanup of associated resources and potentially causing memory leaks; Fixed in Firefox 153 – Bug 1653876
• Fixed webNavigation.onCommitted being dispatched twice for cross-origin iframes loaded under Fission, caused by a redundant OnStateChange trigger firing in addition to OnLocationChange; Fixed in Firefox 153 – Bug 1750196

DevTools

• Chris Vander Linden made the Search input component shared as we plan to use it in the Netmonitor as well (#2019260, #2027580, #2027582)
• pullmana8 improved error management in the DevTools protocol (#2031735)
• Chris H-C :chutten removed Legacy Telemetry devtools instrumentation (#2039650)
• :glob ✱ fixed an issue in the Inspector where the swatch color for variable in @starting-style rule could have the wrong color (#2016778)
• Nicolas Chevobbe [:nchevobbe] exposed heading level more clearly in the accessibility tree (#1588784) and in the accessibility highlighter (#2044904)

• Julian Descottes [:jdescottes] migrated the markup view to HTML (from XHTML) to fix an issue when editing the markup (CodeMirror 6 does not support XHTML) (#2028058)
• Nicolas Chevobbe [:nchevobbe] fixed an issue in Netmonitor search where it could appear the the search stalled (#2042405)
• Hubert Boma Manilla (:bomsy) added more connection information (ECH, Delegated Credentials, OCSP, Private DNS, …) in Netmonitor Security tab (#2036404)

WebDriver

• Khalid AlHaddad improved the window manipulation commands in Marionette and WebDriver BiDi to allow individual window geometry properties, such as x, y, width, and height, to be adjusted independently.
• Khalid AlHaddad updated our codebase to use constants instead of hardcoded strings for all our session data types.
• Alexandra Borovova updated the “emulation.setLocaleOverride” command to also apply a locale emulation in dedicated and shared workers.
• Alexandra Borovova fixed a regression when there would be no “script.realmCreated” events after the cross-origin navigation.

Search and Urlbar

• Dharma updated context search actions to trigger search instead of entering search mode @ 1945080
• Daisuke and Drew worked on a lot of Nova updates, including ensuring Nova is tested @ 2041255, 2030183, 2019168, 2044849, 2033583
• Moritz has worked on several refactorings to allow the urlbar to be used in content @ 2039828, 2039298, 2041280
• Middle click paste replaces content was fixed by Moritz @ 2042893
• Michel added feature to show registrable domain on desktop after its implementation on mobile @ 1986161

Highlights

• Maxx Crawford added a pref to hide the New Tab logo so users can opt out of branding without altering page layout or resorting to CSS overrides.
• Harshit enabled video overlay detection in Nightly 153, allowing you to use the context menu to control videos on more pages! We plan on letting this ride out in Firefox 153.
  • You can try it out on this Instagram reel in Nightly

• A note to WebExtension authors – as part of a planned deprecation announced last month, executeScript and insertCSS are now restricted from moz-extension pages starting in Firefox 152 – Bug 2015559
• Nicolas Chevobbe [:nchevobbe] added support and debugging for modern attr()(which is enabled on Nightly) (#2014751)

Friends of the Firefox team

Resolved bugs (excluding employees)

Script to find new contributors from bug list

Volunteers that fixed more than one bug

• Sam Johnson
• Sebastian Zartner [:sebo]

New contributors (🌟 = first patch)

• Immaculate Atim: Switch to using an array instead of an object string for browser.backup.enabled_on.profiles
• liz: Screenshots overlay visible on both splitview browsers
• 🌟 Rahman Mahmutović [:r_m]: Can’t change content in box model in inspector for box-sizing:border-box elements
• Takeru Mitsumori: Fix typo in ID name about-translations-swap-langauges-icon in about-translations.html
• 🌟 Freya Arbjerg [:freyacodes]: Blackboxed columns are ignored
•  tom.passarelli: tab-preview-panel emits unpaired popupshown/popuphidden events, breaking sidebar autohide

Project Updates

Add-ons / Web Extensions

Addon Manager & about:addons

• As part of the work for the Project Nova about:addons page restyling, the about:addons sidebar has been migrated to the moz-page-nav and moz-page-nav-button reusable components, improving accessibility and visual consistency with the Firefox Desktop about:settings page – Bug 1881767

WebExtensions Framework

• Implemented WebExtensions negative permissions infrastructure, providing the foundations for enterprise policy “blocked host permissions” features – Bug 1745823
• Restricted host permission changes for MV3 extensions force-installed via enterprise policy (matching similar behaviors provided by Chrome enterprise policy behaviors) – Bug 1904054
  • Thanks to Mike Kaply for the implementation of this enterprise policy enforcement feature.

WebExtension APIs

• Fixed handling of <all_urls> as an API permission in Manifest V3, ensuring the permission is correctly initialized on extension install – Bug 1758306

DevTools

• Rahman Mahmutović [:r_m] made it possible to edit width/height in the box model section of the Layout panel (#1717176)
• Sebastian Zartner [:sebo] improved toggling tools driving in-page highlighters (e.g. the Measuring) (#1262773)
• Sebastian Zartner [:sebo] added a setting to control visibility of HTML comments in the markup view (#1455294)
• Freya Arbjerg [:freyacodes] fixed an issue in script blackboxing (#2036767)
• Alexandre Poirot [:ochameau] replaced custom preference to log RDP messages with MOZ_LOG (#1622857)
• Alexandre Poirot [:ochameau] fixed retrieval of garbage collected script text content (#1758454)

WebDriver

• Sameem updated the “Take Element Screenshot” command from WebDriver Classic to crop screenshots of elements which exceed the viewport. This aligns with the specification and avoids errors when attempting to capture huge elements.
• Alexandra Borovova updated the events for new top-level browsing contexts: we will not send anymore “browsingContext.domContentLoaded” and “browsingContext.load” events for them, instead the “browsingContext.contextCreated” event will be sent when a tab is ready to be used. This is required to align with the expected per-spec behavior.
• Henrik Skupin landed a patch allowing geckodriver to gracefully shut down Firefox when geckodriver itself is terminated.
• Hiroyuki Ikezoe disabled Firefox’s “scroll axis lock” feature so WebDriver actions for wheel input devices can scroll in arbitrary directions when using pan gestures.

Lint, Docs and Workflow

• Added a rule to prevent new uses of Preferences.sys.mjs.
• The browser environment globals within ESLint have now been updated. These include Sanitizer, VideoFrame and a few other new ones.
• Temporal, and some other definitions have been added to TypeScript.

New Tab Page

• Much has happened in the last 2 weeks! Here’s a full bug list, and here are some highlights.
• Dre fixed the List widget that was creating a new list too eagerly on the New Tab Page (2033592) — prevents accidental list creation and improves the Lists UI reliability.
• Maxx Crawford fixed Weather widget small card layout issues with opt-in location options and an error message displayed, resolving card overflow and removing the spurious opt-in error so users see a compact Weather card and correct location prompts on New Tab.
• Reem Hamoui added key dates state to the Sports widget, enabling the Sports card to surface event deadlines/key-date highlights on New Tab so sports users see timely date info.
• Scott Downe added a manage widgets option to the New Tab nova widgets context menu, giving users a direct context-menu entry to open the widget management flow from any widget with Nova enabled.
• Scott Downe added a reusable Newtab widget base component to centralize lifecycle, focus/keyboard handling, DOM templates, and telemetry hooks, reducing duplication and making widget behavior more consistent; see Newtab widget base component.
• Dre converted per-widget expansion handling to a shared widget expansion handler to unify expand/collapse state management and prevent widgets from incorrectly retaining or losing expanded state; see Convert widget expansion handling to shared widget expansion.
• Nina Pypchenko [:nina-py] updated the Sports widget to populate the “follow teams” state from the /teams endpoint, so follow/unfollow toggles now reflect server-side subscriptions and reduce incorrect follow states.
• Scott Downe moved widget menu items within New Tab widgets to standardize menu ordering and action grouping, so users find Add/Remove/Configure entries in expected positions across platforms.
• Dre fixed a World Clock city search bug for the word clocks widget, restoring expected search filtering/matching so city lookups return correct results.
• Scott Downe fixed an issue where the New Tab small weather widget size change didn’t always apply by correcting the widget size update path (JS/CSS layout interactions), improving consistent rendering for small-tile weather across responsive breakpoints and platforms; see Newtab small weather widget size change doesn’t always work.
• Nina Pypchenko [:nina-py] added a group stage section to match highlights in the sports widget on New Tab so users now see stage-aware grouping and stage labels on match highlight cards, making tournament context (group vs knockout) visible while browsing highlights.
• Dre fixed the small world clock widget not expanding to large while editing clocks so users can enter edit mode and expand the widget as expected; the change wires the edit-mode resize handler to update widget size/class during edits.
• Maxx Crawford added WCW OMC message strings so World Cup widget messaging flows on New Tab now display the correct copy (localized where available) instead of falling back to missing-text behavior.
• Reem Hamoui added a “View all” button and a list view for the results tab at medium widget size so Sports widget users on medium New Tab tiles can expand results and scroll full lists without resizing the widget.
• Maxx Crawford added WCW “Watch Live” stream strings to the Sports widget strings bundle so the widget can surface a localized “Watch Live” CTA for applicable events.
• Dre restored VoiceOver reachability for Edit/Remove in World Clock on macOS so macOS VoiceOver users can now focus and activate clock Edit/Remove controls thanks to accessibility role/label and focus-order fixes.
• Maxx Crawford removed the persistent browser logo when all new-tab features (Top Sites, widgets, content feed) are disabled by adding a conditional render guard in the New Tab component, preventing an orphaned logo (2041033).
• Mike Conley added New Tab jest tests to the node tests Tier 1 CI job Run newtab jest tests as part of node tests Tier 1 job to catch regressions earlier in CI
• Irene Ni shipped multiple visual fixes for the Sports widget Sports widget – various visual fixes (spacing, truncation, icon alignment, clipping) to improve readability and layout on constrained viewports.

Picture-in-Picture

• kpatenio adjusted our YouTube site specific wrapper so that the URL bar toggle appears more reliably, especially when selecting videos from the YouTube search page.
• Thanks to Sylvestre for patching some bugs to prevent some spurious console errors!
• Niklas fixed captions on autopip videos failing to sync with the origin videos.

Performance Tools (aka Firefox Profiler)

• Firefox Profiler now has a CLI! We also added a profiler-analysis skill to the Firefox codebase. Once you capture a performance profile, you can ask Claude or an AI to analyze it by providing a link or local path. You can use it to analyze a performance regression or debug an issue if you have a profile at hand.
  • https://www.npmjs.com/package/@firefox-devtools/profiler-cli
  • You can install it with npm install -g @firefox-devtools/profiler-cli@latest

Search and Urlbar

Nova UI refresh

• Drew and Daisuke continued working on reorganizing styles and updating the urlbar for Nova.
• 2019154, 2019152, 2041501, 2040532

Suggest

• Drew landed several Suggest improvements: realtime suggestions colors, sports suggestions received World Cup tweaks, and online Suggest via OHTTP was enabled for eligible users in Firefox 153.
• 2040561, 2039753, 2035614, 2038843

Adaptive autofill

• James fixed soft-block counting to track autofill dismisses, rather than consecutive backspaces on the same autofill, and added telemetry to measure URLs reintegration after blocking.
• 2040819, 2037177

Quick actions

• Dharma created a new Firefox Labs quick action, fixed the Update action button, and re-enabled ScotchBonnet in some tests that were not updated yet.
• Caleb added Calculator support for certain unicode operators.
• 2023169, 1928635, 1923383, 2033861

Multi Context Address Bar

• Moritz continued refactoring the urlbar code: converted some of the js modules to not be system modules, fixed dynamic results templates, incorrect reuse of result rows, and keyboard shortcuts on the unified search button panel.
• 2039297, 2036095, 2039844, 2037933, 2030050

Other

• Marco, Drew and Daisuke fixed several intermittent test failures.
• 2038510, 2023908, 2011584, 1938142, 1971091

Search

• Mark removed old WebExtension-based search engines from the source tree, removed loading of search add-ons from resource://search-extensions/.
• Caleb fixed multiple documentation issues and added a test covering searches from a private window.
• 1904613, 2035878, 2037942, 2033545, 2005724

Places

• Marco removed some unnecessary database transactions, fixed the bookmarks panel folder dropdown on Windows, and resolved several intermittent test failures.
• Thanks to Sam Johnson who fixed the bookmark edit panel showing “mobile” instead of “Mobile Bookmarks”.
• 2039534, 1505800, 2008829, 2029541, 2035084

Highlights

• James enabled adaptive autofill in Nightly for testing, which we believe should provide better results in the URL bar when doing autocomplete!
• Jack updated the illustrations shown on some of our error pages to match the latest approved designs, giving users more polished artwork when the browser encounters connection or security errors!

• Controls for the Memories feature can now be set during Smart Window onboarding

 

• We’ve disabled the CSS filter implicitly applied to WebExtension pageAction SVG icons across all release channels starting in Firefox 152, completing the deprecation
  • NOTE: The blog post published at WebExtensions API changes in Firefox 149-152 provides to extensions developers more details about this deprecation and links to the related MDN docs.

Friends of the Firefox team

Resolved bugs (excluding employees)

Script to find new contributors from bug list

Volunteers that fixed more than one bug

• Amin Amir
• Pranjali Srivastava
• Sam Johnson

New contributors (🌟 = first patch)

•  🌟:23rd: Regression: The new swipe-to-navigation indicator stucks for a moment, when deciding not to navigate the other page
• 🌟Akeem Omosanya: Remove commented-out code in SearchService.sys.mjs
• Amin Amir:
  • 🌟Fix browsingContext.sys.mjs to assign to #contextCreatedHandled instead of contextCreatedHandled
  • Fix missing WITHOUT ROWID SQLite performance optimization in SERPCategorization.sys.mjs
• 🌟Sahaj: Suggest the default target language for translation after changing the detected source language
• 🌟JIANG Zhirui: Breakpad build failed on Windows using VS2026 due to removal of stdext
•  John Iweh: Add “Open in New Tab” and “Open in New Container Tab” options to the context menu for Tabs from Other Devices
• Jak: Bookmarks and History – should respect the “When you open a link, image or media in a new tab, switch to it immediately” setting
• 🌟Andy [:rgbcmy]: Autoplayed next video should also be PIP
•  konyhéa: “Escape” key should collapse the expanded on hover sidebar launcher even if hover is still active.
•  Pranjali Srivastava:
  • Remove icon property from sidebar extensions
  • Show language-agnostic SelectTranslations context menu item when the source and target languages are the same

Project Updates

Add-ons / Web Extensions

Addon Manager & about:addons

• Fixed long-standing regression on the autocomplete and datalist popups for extension inline options pages on about:addons (introduced in Firefox 68 by Bug 1532724, fix shipping in Firefox 152) – Bug 1595158

WebExtensions Framework

• Fixed access to web-accessible resources declared with <all_urls> from sandboxed documents (null-principal URLs), restoring extension redirects from the context-menu search flow, starting in Firefox 152 – Bug 2033905

WebExtension APIs

• Added exhaustive test coverage for tabs.move() against additional edge cases related to split-view tabs – Bug 2029092

DevTools

• Andreas Farre improved the Session History tab in the Application panel (still behind devtools.application.sessionHistory.enabled)
  • added support for remote debugging (#2014064, #2016121)
  • made sure that calls to History.replaceState are reflected in the UI (#2037359)
• Julian Descottes [:jdescottes] fixed the most frequent DevTools crash we were observing in Telemetry, adding a guard against IDBTransaction errors when retrieving breakpoints in the Debugger (#2030260)
• Nicolas Chevobbe [:nchevobbe] fixed the image preview tooltip for relative URLs images in constructed stylesheet (#2035503)
• Julian Descottes [:jdescottes] reduced the overhead we had because of network requests monitoring by only decoding response content when the user actually want to see the response (#2026228)

WebDriver

• Amin Amir cleaned up an incorrect variable assignment in our browsingContext module.
• Logan Rosen updated stale references and broken links in our documentation about Marionette.
• Sameem improved the Marionette and WebDriver BiDi screenshot commands to enforce maximum allowed dimensions.
• Leo McArdle fixed the regression in the “log.entryAdded” event, which lacked an error message in the “text” field for the messages of type “error”.
• Henrik Skupin fixed an issue in Marionette where WebDriver:Navigate and WebDriver:Refresh did not handle errors when the underlying navigation failed.
• Henrik Skupin improved geckodriver to detect an early Firefox exit during startup on Android, avoiding up to 60 seconds of unnecessary connection attempts.
• Henrik Skupin updated the geckodriver CI build job to produce a universal macOS binary supporting both x64 and aarch64.

Lint, Docs and Workflow

• Sylvestre ported some linters (e.g. file-whitespace, test-manifest-toml, license, file-perm, rejected-words & more) to Rust to help improve the runtime of the code review bot.
• Dale has been working on migration to moz-src for customkeys, dom/quota and odom/geolocation
  • https://arewemozsrcyet.com/

New Tab Page

• We did our first region-specific trainhop on May 11th (just 15% of the US), and turned on HNT Nova (and sometimes Widgets) for those clients to get some advance-data of its behaviour in the wild! A note that HNT Nova gets turned on for everybody when Firefox 151 ships on May 19th.
  • We’ll be launching a similar experiment in the DE, probably on May 12th, also at 15% population.
• Most of the team is heads down building out a sports-tracking widget, attempting to get that ready in time to be generally available for the upcoming World Cup event.
• Dre landed a new world clock widget, which is currently off by default, but pretty snazzy!

Search and Urlbar

• Nova (URL Bar Design Refresh)
  • Drew and Daisuke continued their work on Nova styling for the Address bar (input and view).
• Search and Suggest
  • Drew finalized two bugs for World Cup and sports suggestions, which were landed and uplifted: one to update the localization string for scheduled games and another to show both teams’ icons in suggestions. Drew also landed and uplifted a fix for rich search suggestion icons being forced into a square aspect ratio.
  • Standard8 updated Ecosia favicons to the latest branding, including QA testing and publishing.
• Settings Redesign (SRD)
  • Stephanie landed a test to ensure search suggestion settings are hidden when quicksuggest is disabled, as well as a patch to resolve TypeScript issues in search.mjs, and is adding test coverage to confirm removed search engines are not displayed in the default engines dropdown.
• General URL Bar and Component Updates
  • Daisuke landed implementation of the context menu on URL bar results, and a fix to show the loading URL in the URL bar when starting up with a homepage.
    • Marco is working on several tasks, including a PDF download / focus stealing issue and allowing arrays to be bound in Sqlite.sys.mjs. Marco also worked on fixes related to Places, such as avoiding replacing the favicons database if it is not corrupt.
  • Standard8 finalized the URL bar test manifest split. Standard8 also upgraded us to TypeScript 6.
  • Moritz landed a fix for URL bar abandonment telemetry being recorded when clicking an engine in the unified search button popup (Bug 2032973), which was also uplifted. Moritz also simplified search mode switcher item activation in tests, and made it so that the unified search button popup closes when installing an open search engine.

Smart Window

• natural language starting with tab close/undo 2035343 with expandable action log 2031508

• assistant rendering feedback up/down 2032994 and markdown table 2027029
• nova styling blur 2027877 and suggestions 2026823
• accessibility screen reader 2028676 and keyboard focus 2037565
• optimize conversation starters extra requests 2030005 and caching 2033430

Storybook/Reusable Components/Acorn Design System

• Nova token updates occasionally, focused on SRD

UX Fundamentals

• Added support for the “SEC_ERROR_CA_CERT_INVALID” certificate error to the Felt Privacy error pages. – 2035942

Settings Redesign

• Settings redesign is being tested and will hopefully go out in Firefox 152!

Highlights

• Import attributes will be supported for WebExtensions, starting in Firefox 150!
  • This allows WebExtension authors to import CSS module scripts and JSON into their JavaScript modules.
  • Examples:
    • import sheet from ‘./styles.css’ assert { type: ‘css’ };
    • import schema from “./policies-schema.json” with { type: “json” };
• The Web Serial API is now available for testing in Firefox Nightly!
  • See https://fosstodon.org/@balloob/116398481380578311 for more details on how to test this our yourself.
• Dharma created a new quick action for Firefox Library
  • You can test this out in Firefox Nightly 151 by typing “library” in the URL bar

• Alexandre Poirot [:ochameau] Enabled the JS Tracer DevTool by default on Nightly
  • Read up on how to use the JS Tracer to analyze JavaScript usage on the web here

Friends of the Firefox team

Resolved bugs (excluding employees)

Volunteers that fixed more than one bug

• Chris Vander Linden
• Chukwuka Rosemary
• DrSeed
• EJiro Oghenekome
• Frédéric Wang Nélar
• Itoro James
• japandi
• John Iweh
• jonathancabera
• Josh Aas
• Justin Peter
• Keji Bakare
• kofoworola shonuyi
• konyhéa
• Noble Chinonso
• Okhuomon Ajayi
• Oluwatobi
• Pranjali Srivastava
• ROSHAAN
• Sameeksha

New contributors (🌟 = first patch)

• 🌟 Ben: UI issue in AST locale in Responsive design mode > (open Device picker) > Edit List… > Add Custom Device
• Brian Tsoi [:btsoi]: Create a badram checking library
• 🌟 Chidimma Okoloigwe: Port over tests in browser/base/content/test/sidebar
• japandi:
  • 🌟Use cenum for nsIHelperAppLauncherDialog reason constants to enable better typescript annotations
  • The height of the pinned tabs area should be responsive to the number of pins
  • Tab notes should not be saved when input contains only spaces
• Nathan Johnson [:narjoDev]: Remove browser.display.use_system_colors pref
• DrSeed:
  • 🌟Remove the defaultLauncherVisible Nimbus variable
  • Firefox shows vertical tabs in new windows despite “Hide tabs and sidebar” setting
  • The “Expand sidebar on hover” option is not kept after the vertical tabs are disabled and enabled again
• EJiro Oghenekome:
  • 🌟Tests required for view>sidebar menu items
  • Remove old sidebar icons no longer and replace with new.
  • Rename SidebarController.initializeUIState() and SidebarState.loadInitialState()
• Keji Bakare:
  • 🌟 Hide “Open Link in Split View” menu option for pinned tabs
  • The right tab name and icon slightly move when the Split View is selected
  • Split view’s focus-outline is clipped on the right side of left tab
• 🌟 gotyaoi: Reload toolbar button is active on about:newtab
• 🌟 Hailia: Copied profile edit page heading should enclose profile name in quotes
• geppy: Rename –theme-graphs-* CSS variables
• Itoro James:
  • 🌟 [FxMS Docs] Document the feature callout anchor selector’s ::%shadow% token
  • [A11y][Keyboard Navigation]Cancelling a note via Keyboard Navigation still saves it
• John Iweh:
  • 🌟 The notification dot is not displayed if the tab is in a Split View
  • sidebar-shown attribute remains when sidebar.revamp is false
• jonathancabera:
  • 🌟 A Note with long text (1003 characters) is saved by pressing ENTER even if the “Save” button is disabled
  • Tab group guide line becomes disconnected under certain conditions related to split views in vertical tab mode
• Aloys: Remove logic that forces distribution language packs to be reinstalled when upgrading from Firefoxes older than 67
• Mary cathline: Tab Group Label does not respect touch density in vertical tab bar
• 🌟 Brandon Lucier: Popups opened with window.open give window type normal instead of popup
• karan68: [dialog] New Shortcut dialog needs a label/accessible name
• 🌟 Osoble: Update font size and weight for synced tabs device name headers in Firefox View
• konyhéa:
  • 🌟 don’t restrict the sidebar width so much (to better support non-English locales)
  • Add hairline separators between synced tabs device lists on the Recent Browsing page in Fx View
  • Firefox View breakpoint for collapsing the sidebar triggers too late
  • Split view does not show colored outline when used as a group target during dragging
• Noble Chinonso:
  • 🌟 Add the ‘command’ property to the SidebarStateProps definition
  • Timestamp not displayed for items under “Tabs from other devices” in Firefox View Next tab
  • Move tab to Start/ End options are enabled and not working, even if the Split View tab is already at start/en,d and the other view is focused
  • Mismatched closing tag in syncedtabs-tab-list.mjs itemTemplate
  • Do not capitilize “tagName” returned from “WebDriver:GetElementTagName” command
  • #shouldHandleEvent in SidebarTreeView.js compares event.keyCode to string values, causing Home/End keys to never be handled
• Knot False: Remove nsIScriptableUnicodeConverter from services/common/utils.js
• Pranjali Srivastava:
  • 🌟Remove virtualizer pref
  • Add a test to verify that the space above tabs is consistent across PB, LWT and sizemode (where appropriate)
  • In the about:opentabs page the containers icons have no padding on the right side while hovered
• Okhuomon Ajayi:
  • More spacing is needed between the tab note icon and the close icon on the tab
  • Split view container and vertical tabs are misaligned when resizing the sidebar down
  • Vertical split view tabs can be too big or small when tabs are overflowing
• 🌟 Rishan: Fix duplicated arrow function in browser_history_sidebar.js
• Chukwuka Rosemary:
  • 🌟 Remove the max-history-rows pref used in Fx View
  • “Forget About This Site” context menu option missing from Firefox View history
  • Long strings are not displayed properly on the about:opentabs page search filed
  • Add test for Forget This Site option in Fxview history context menu.
• ROSHAAN:
  • 🌟 Tab note background colour is incorrect for default light theme
  • [win/linux] The splitter between content areas does not match Figma spec
  • Fix typo in OpenInTabsUtils.confirmOpenInTabs()
• Sameeksha:
  • 🌟 Remove redundant lazy pref getters in SidebarPinsPromo
  • Dialog lacks accessible name (Recent activity section > ••• disclosure > Delete from History dialog)
• kofoworola shonuyi:
  • Actually hide or remove sidebar-shown attribute when in fullscreen.
  • <sidebar-main> has “sidebar-ongoing-animations” set but never removed
  • Add a test for checking sidebar-shown attribute in fullscreen mode
• 🌟 Sayd Mateen: Page URL is displayed as tab name when page’s <title> contains about:reader?
• Oluwatobi:
  • 🌟 Remove the IE importer and tests
  • Unable to delete selected history entries from sidebar
  • The city name heading level doesn’t follow the correct heading level order

Project Updates

Add-ons / Web Extensions

Addon Manager & about:addons

• Removed obsolete migration logic that forced distribution language packs to be reinstalled when upgrading from Firefox versions older than 67 – Bug 2000797
  • Thanks to Aloys for contributing the changes needed to cleanup this old XPIProvider migration logic

WebExtensions Framework

• Fixed a regression where WebRTC permission popups were queued and suppressed while an extension popup was open – Bug 1982832

WebExtension APIs

• Fixed an edge case where tabs.move would revert splitview tabs order while moving splitview tab to a new window  – Bug 2028832
• Fixed windows API reporting window type normal instead of popup for windows opened via window.open() – Bug 2030631
  • Thanks to Brandon Lucier for contributing this small but very much appreciated fix to the windows WebExtensions API!

DevTools

• Nicolas Chevobbe [:nchevobbe] added support for multi-conditions @container rules in the Inspector (#2023125), add specific style for unmatched conditions (#2030236)

• Nicolas Chevobbe [:nchevobbe] added container-name in the @container tooltip (#2030731)

WebDriver

• Henrik Skupin fixed a bug in the WebDriver BiDi session.new command where an empty proxy object was returned in the capabilities when no proxy was requested, even though that is not valid according to the CDDL.
• Henrik Skupin landed support for browser.setClientWindowState, originally started by Dan and continued by Liam DeBeasi, with final fixes and improvements completed after earlier contributors were unable to continue.
• Alexandra Borovova improved the “text” field of the “log.entryAdded” event to better align with Firefox DevTools behavior and Google Chrome WebDriver BiDi implementation.

Lint, Docs and Workflow

• A problem with the ESLint-build builder has been resolved. This had meant that the valid-ci-uses and valid-services-property rules were not being run.
• Work is ongoing to get various css files passing the use-design-tokens rules.

New Tab Page

• You can preview Nova on the New Tab browser.newtabpage.activity-stream.nova.enabled to true, and then opening a few tabs.
  • The browser.nova.enabled pref was just introduced to turn on the Nova design tokens. That’s still very much a work in progress.

Picture-in-Picture

• aoia7rz7l for added PiP wrapper captions support to various public Invidious instances
• chutten removed all legacy PiP telemetry
• sfarre is working on PiP API support and has a patch up integrating it nicely with our native implementation

Search and Urlbar

Search

• Mandy updated the search-config-v2 schema for partnerCodes (2027191)
• Florian fixed a high frequency intermittent test failure in the search code (2009494)
• Standard8 fixed a bug with duplicate keywords for search engines, so that we now prefer the default search engine (2024714)

Nova

• mconley made a rounder search input for about:newtab and about:privatebrowsing (2027144)
• Drew is continuing his work on making Nova updates to the urlbar  (2026859)

New searchbar

• Moritz and Dao continue re-implementing the search bar using urlbar modules  (2027749, 2027578, 2002834, 2025904, 2027565)

Urlbar

• Dharma also fixed a quick action telemetry error (1955058)
• James has been working on Adaptive History for Autofill Improvements (2019695, 2019695, 2021079, 2019719, 2021036, 2028730, 2021039, 2019626)
• Gijs landed a patch so that we use aria-notify instead of A11yUtils.announce for UrlbarView’s “special” announcements (2026753)
• Dale added a tooltip to engines in the unified search panel (2028668)
• Drew has been working on sports suggestions (2025052)
• James fixed a bug where persisted search was not working for Fx versions prior to 148 (2025933)

Smart Window

• preparing for 150 mvp with various uplifts from 151
• telemetry: assistant 2024869, input/suggestions 2009615, MLtelemetry 2019772, settings 2009612
• security: spotlighting 2020807, url ledger 2023001
• polish: autoopen sidebar pref 2029686, memories strings 2029262, report issues link 2029257
• bugs: keeping conversations when switching windows 2026239, switching tabs 2023284, transition fullpage to sidebar 2024781
• a11y: ask button state 2015485, smartbar announce 2016758

Storybook/Reusable Components/Acorn Design System

• From more than two weeks ago (sorry I wasn’t here and forget if they were shared):
  • Finn converted the Settings page nav to match Firefox View/new design Bug 1867385
  • Mark S imported the initial Nova design from Figma Bug 2021477
    • Currently behind browser.design-tokens.nova but moving to browser.nova.enabled today most likely
  • Mark S created an Icon Directory in Storybook – Bug 1990228
• Mark Striemer added breadcrumbs to sub-panes in Settings
• Anna Kulyk fixed arrow keys not working with panel-list variant of moz-select with separators
• Mark Kennedy fixed an display issue with the Applications view not updating when cancelling the Use other option
• Finn Terdal fixed some page navigation issues:page nav leaves a large gap when it first collapses to icon-only, sub-pane content being clipped by sticky search bar, reintroduced the vertical border next to static sidebar in prefers-reduced-motion
• Jules Simplicio landed a UI polish pass for the Settings Redesign with spacing, focus-ring, and contrast tweaks across subpanes, improving readability and target sizes.
  • This also updated some global styling for card, message bar, text input border radiuses/colors and the moz-promo component got a refactor with better support for image styling by default
• Hanna Jones updated copy and illustrations for the Account and sync page, so it’s ready for SRD release
• Osmond Arnesto converted urlbar variables to design tokens, preparing for JSON conversion and Nova import from Figma
• Jon Oliver converted tab variables into design tokens, and set them up in JSON for Nova import from Figma
• Jules Simplicio has been updating variable names in the Figma Nova Components/Styles files so our design token naming is consistent between Figma and central (so we can run our import script for more Nova automation)

UX Fundamentals

• Felt Privacy error pages now support more NSS errors instead of falling through to the legacy page. Updated introductory text for the denied-port-access error. – 2024150
• Fixed a test in browser_aboutCertError.js that was failing on Linux opt standalone and removed the platform skip. – 2028651
• Added clock skew detection to the Felt Privacy error pages. When a certificate error is caused by a wrong system clock, the Felt Privacy error pages now show the same dedicated clock-skew message that the legacy error pages had, and helps guide users to correct their system time. – 2025049
• ​​Fixed misaligned bullet points in the “What can you do?” section of Felt Privacy network error pages, restoring correct visual indentation for that list. – 2028632