Firefox Headlines (November 18, 2021)

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Harry Twyford

Nov 18, 2021, 2:52:17 PM11/18/21

Hello Firefox fans!

The Firefox Desktop team has been brewing these updates for weeks. Now we present them to you, farm-to-table: they're organic, direct trade, and locally roasted.

Many thanks to Mike Conley, Bernard Igiri, and Katherine Patenio, who helped put these updates together.


Friends of the Firefox team


  • Welcome Mandy Cheang [:mcheang] to the Search team!

For contributions from November 2nd to November 16th 2021, inclusive.

Resolved bugs (excluding employees)

Fixed more than one bug

New contributors (🌟 = first patch)

Project Updates

Add-ons / Web Extensions

WebExtensions Framework
  • Emilio fixed a bug that was preventing users to interact with browserAction popups using touch screens - Bug 1696786 (regressed in Firefox 86 by enabling APZ in popups loading a document in a child process, Bug 1493208)
  • Fixed a bug in the child processes initialization, which was preventing the permissions to be correctly transmitted from the parent to the child process once a non-http/https blob url is created and new processes spawned - Bug 1738713
    • NOTE: technically this wasn’t an extension-specific issue, but it was easy enough to trigger by extensions using the “browser.contentScripts.register” API method and so it happened to be reported to us as a WebExtensions issue  
  • As part of the ongoing work related to the “Manifest Version 3 background service worker”, we have landed some more changes to notify the WebExtensions internals when a background service worker is being spawned, loaded and destroyed - Bug 1728326 (still only enabled on Nightly along with other parts of the “MV3 background service workers” internals)


  • flod has written up some excellent documentation on localization best practices that we should all check out.
    • Juicy tidbit: did you know that “Save document?” in English becomes “A bheil thu airson an sgrìobhainn a shàbhaladh” in Gaelic? So be careful with static dimensions for things containing text!

Form Autofill

High-Contrast Mode (MSU Capstone project)

Desktop Integrations (Installer & Updater)

Lint, Docs and Workflow

Password Manager 



Below the fold

[mconley] Firefox::General triage! Interested in seeing the process? You can join the audience this Thursday, November 18th from 1PM - 1:30PM ET. Zoom link. There’ll be another one on Thursday, November 25th from 1PM - 1:45PM ET at the same link.

This information, including all of the previous updates, are fully available in this doc:

Also note that I'm really just synthesizing and humanizing the stuff that's on the Wiki, which is freely available from here:, so check that out if you want the source material. It'll also be posted (minus the Below the Fold stuff) to the Nightly blog.

Finally, if there's a Firefox-ish team that you feel isn't being represented here, please let them know about the above meeting so we can get their updates.

Keep on rockin' the free web,

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