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Today’s meeting leader is: dthayer

General Topics / Roundtable

  • [jaws] Add a password for this Zoom meeting?

Friends of the Firefox team


Resolved bugs (excluding employees)

Fixed more than one bug

  • Andrew Swan [:aswan]
  • Farooq AR
  • Itiel
  • Martin Stránský [:stransky]
  • Etienne Bruines

New contributors (🌟 = first patch)

  • <Will be filled in after the meeting>

Project Updates


Add-ons / Web Extensions

Addon Manager & about:addons

  • Andrew Swan contributed the changes needed to handle updates for built-in extensions (the one bundled into the omni.ja) Bug 1571876, which was also a blocker for completing the migration of some system addons into built-in (e.g. Screenshots as part of bug 1568270), and another change to avoid checking the blocklist for built-in and system addons (Bug 1633396), which is likely helpful to avoid some additional work during the startup 🎉🎉🎉

WebExtensions Framework

  • Fixed a regression in Firefox 76 related to the runtime.onConnect API event (Bug 1635637), the regression has been reported on bugzilla for Amazon Assistant extension (but it was likely going to affect some other extension), thanks to Tomislav for quicking working on a fix (and Rob for helping on quickly investigating the reasons behind the regression).
  •  :baku fixed a regression that was going to break “Reddit Enhancement Suite” in Firefox 77 (Bug 1635490)
  • Fixed a regression in Firefox 78, related to the webRequest event listeners, that was likely going to affect Adblock Plus (Bug 1638581). Fixing this regression did also fix Bug 1638476 (related to the new “blocking by extension” feature part of the devtools network panel)

WebExtension APIs

  • Additional parts of the new rust-based backend landed in the last two weeks (Bug 1623245, Bug 1634191, Bug 1637169, Bug 1635688, Bug 1637165), Thanks to the markh and lina!
  • Contributions:

    • The new browser.tabs.goForward and browser.tabs.goBack API methods are now also supported on GeckoView / Fenix (Bug 1633328). Thanks Atique for contributing this new API on both Firefox Desktop and GeckoView!

    • does now remember the most recently used directory when the API call does also use the “saveAs: true” option (Bug 1395207). Thanks to Mark Smith for contributing this enhancement!


Firefox Accounts

Sync and Storage


Developer Tools

  • Console panel - You should be able to inspect thrown expressions, regardless of their type (bug)


screenshot online

  • Console panel - Unhandled rejected promise now have a proper callstack attached (bug)


screenshot online

  • Console panel - On Nightly you can inspect an error object in the sidebar (bug)


  • Debugger panel - map scopes for Logpoints (bug)


screenshot online

  • About:debugging - See/change remote URL from about:devtools-toolbox (bug)


screenshot online

  • Network panel - drag and block (bug)


screenshot online

  • Network panel - Showing request rejected by CORS


screenshot online

  • Network panel - Showing name of the related Add-on for for blocked resources (e.g. uBlock, Adblock Plus, etc.) bug


screenshot online

  • Network Panel - Headers panel facelift (better summary info + expandable URL & query arguments inspection) bug


screenshot online

  • Fission - Call for Fission feedback (+ RDM shipped to DevEdition)


Installer & Updater


  • Kwan landed a set of patches to ensure that we don't throw bare `Components.results` items in Javascript, instead ensuring they are wrapped in `Components.Exception`.

New Tab Page

  • (non verbal) Nothing new, just moving along with this nightly plan

    • Some l10n work to “sponsored by” tag for other languages.

    • (experiment) New card treatment for stories that link to videos.

    • (experiment) Moving popular topics element a bit up the page.


Password Manager

PDFs & Printing


  • bigiri working on running the snippets code entirely within the content process.
  • emalysz has a patch in review which shows a consistent 25% improvement in startup times on Windows reference hardware by changing the list of DLLs we preload during startup:


  • florian landed work to exit(0) at the end of mochitests on opt builds, saving infra time.
  • Gijs and emalysz landed several patches to lazily insert panels and popups into the DOM only as needed.
  • dthayer is working on patches to eliminate omnijar reads during typical startups by expanding the scope of the startup cache, allowing us to avoid IO and lazily open omnijar files.
  • emalysz is experimenting to see if we can decrease the shutdown terminator’s timeout setting without substantially increasing overall shutdown hangs, with the hope of limiting time spent waiting for a hung shutdown (for instance, during OS shutdown).

Performance Tools

  • No updates this week.


  • No updates this week.


Remote Protocol (Chrome DevTools Protocol subset)

Search and Navigation


  • Modern Search Configuration

    • We have just finished landing a set of patches for integrating our partner distribution engines into the configuration. This allows us to manage these in a better way and reduces the amount of special code for distributions.

  • Improving region detection

  • Cleaning up the search service

    • With modernisation now almost shipping, the next steps will be to start a late spring clean on the search service. This is mainly aimed at cleaning up the startup code and handling of configuration changes, though other areas will be included as well.

Address Bar

  • the address bar can now recognize custom domain suffixes using browser.fixup.domainsuffixwhitelist.yoursuffix (.test, .example, .invalid, .localhost, .internal, .local are set by default) - Bug 1634650
  • Search suggestions are now highlighted differently, only non typed words and tail of typed words are highlighted - Bug 1636696
  • The team continues working on improving results matching and composition, a few things we’re currently looking into:

    • historical and tail search suggestions

    • experiments about new search experience

    • more consistent search or visit heuristic when typing

    • Improved autofill and scoring

User Journey