Firefox Nightly: Giving You More Control – These Weeks in Firefox: Issue 204

Highlights

• Maxx Crawford 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.
  
  
  
  • , executeScript and insertCSS are now restricted from moz-extension pages starting in Firefox 152 – added support and debugging for modern attr()(which is )
  
  
  
  

  

  
  

  Friends of the Firefox team

  
  

  
  

  Volunteers that fixed more than one bug

  
  
  
  
  • Sam Johnson
  
  
  • Sebastian Zartner [:sebo]
  
  
  
  

  New contributors (🌟 = first patch)

  
  
  
  
  • Immaculate Atim:
  
  
  • 🌟 Rahman Mahmutović [:r_m]:
  
  
  • 🌟 Freya Arbjerg [:freyacodes]:
  
  
  
  

  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 –
  
  
  • Restricted host permission changes for MV3 extensions force-installed via enterprise policy (matching similar behaviors provided by Chrome enterprise policy behaviors) –
  
  
  
  

  DevTools

  
  
  
  
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  WebDriver

  
  
  
  
  • Sameem updated the “Take Element Screenshot” command from WebDriver Classic to . This is required to align with the expected per-spec behavior.
  
  
  • Henrik Skupin landed a patch so WebDriver actions for wheel input devices can scroll in arbitrary directions when using pan gestures.
  
  
  
  

  Lint, Docs and Workflow

  
  
  
  
  • Added a rule to . These include Sanitizer, VideoFrame and a few other new ones.
  
  
  • Temporal, and some other definitions have been , and here are some highlights.
  
  
  • Dre fixed the List widget that was creating a new list too eagerly on the New Tab Page (, 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, 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.
  
  
  • Nina Pypchenko [:nina-py] within New Tab widgets to standardize menu ordering and action grouping, so users find Add/Remove/Configure entries in expected positions across platforms.
  
  
  • Dre.
  
  
  • Nina Pypchenko [:nina-py] 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 so Sports widget users on medium New Tab tiles can expand results and scroll full lists without resizing the widget.
  
  
  • Maxx Crawford 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 ( to catch regressions earlier in CI
  
  
  • Irene Ni shipped multiple visual fixes for the Sports widget, especially when selecting videos from the YouTube search page.
  
  
  • Thanks to Sylvestre for patching to prevent some spurious console errors!
  
  
  • Niklas )
    
    
    
    • 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.
      
      
      
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      Other

      
      
      
      
      • Marco, Drew and Daisuke fixed several intermittent test failures.
      
      
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      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”.
      
      
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      Vollständiger Original-Bericht

      Ausführliche Details, Code-Beispiele & Hersteller-Stellungnahme auf blog.nightly.mozilla.org.

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