Support/Firefox131

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Firefox 131 release information

Disclaimer

The following information is intended for members of the Mozilla Support community for the purpose of supporting users in the Mozilla Support platform. Mozilla Support is a community of enthusiastic volunteers and employees trying to support Mozilla's users around the globe. You can join us by contributing through the following ways:

Release notes

Bug boards

Dot releases

Platform Version Release date Notable fixes Unresolved
Firefox/Focus/Klar for iOS Firefox/Focus/Klar for iOS 131.1 October 8, 2024 - -
Firefox Desktop Firefox desktop 131.0.2 October 9, 2024 Security fix -
Firefox ESR Firefox ESR 128.3.1 October 9, 2024 Security fix -
Firefox ESR Firefox ESR 115.16.1 October 9, 2024 Security fix -
Firefox, Focus, and Klar for Android Firefox, Focus, and Klar for Android 131.0.2 October 9, 2024 Security fix -
Firefox Desktop Firefox desktop 131.0.3 October 14, 2024 Bug1923500, bug1922278, bug1919678, bug1918681, and security fix -
Firefox, Focus, and Klar for Android Firefox, Focus, and Klar for Android 131.0.2 October 14, 2024 Bug fixes -
Firefox for iOS Firefox for iOS 131.3] October 17, 2024 Bug fixes -

Contributor discussions

Please refer to the following contributor forum threads to learn more about known issues and discuss with other contributors:

You can also join our Matrix channel to ask questions/join community discussion.

Stay updated

Apart from sharing release information, there are other ways to stay updated with product release and community updates:

  • Community call: We run a monthly community call (usually a week before Firefox release date). Check our schedule here and don't hesitate to join the call in person if you can!
  • Firefox pod meeting: If you’re an NDA’d contributor, you can watch the recording of our Firefox Pod Meeting from AirMozilla to catch up with the latest train release. You can also subscribe to the AirMozilla folder by clicking on the Subscribe button in the top-right corner of the page to get notifications each time we add a new recording.
  • Newsletter: Consider subscribing to Firefox Daily Digest to get daily updates (Mon-Fri) about Firefox from across the internet.
Note.png
Content in this page is being updated periodically as we're rolling out the release.

What's new in Firefox 131

Firefox Desktop

Tab overview refreshed icon
Description: The team is updating the icon for the Tab overview menu.
Content request: https://bugzilla.mozilla.org/show_bug.cgi?id=1917671
KB article: https://support.mozilla.org/kb/tab-overview-menu Article updated
Temporary permissions
Description: Firefox will now temporarily remember when users grant permissions to sites (e.g. geolocation). Temporary permissions will be removed either after one hour or when the tab is closed. Related bug report: Bug 1754005 - Consider granting temporary ALLOW for site permissions
Content request: No Bugzilla request filed for this
KB article: https://support.mozilla.org/kb/does-firefox-share-my-location-websites#w_how-does-it-work Article updated

Firefox for Android

No notable updates

Firefox for iOS

No notable updates

Known studies/experiments

Platform Studies/experiments Description Feedback collection
Firefox desktop - -

Escalation

TBD

Known issue(s)/Trending topic(s)

Platform Issue Known bug/Related discussions Fix/workaround
Desktop "List all tabs" button impossible to remove https://bugzilla.mozilla.org/show_bug.cgi?id=1918681 We're going to fix that soon and revert back using the drop down icon (Approved for 131.0.3 dot release - bug 1923367)
Desktop Google/Gmail redirecting users to "Clear cache & cookies" https://bugzilla.mozilla.org/show_bug.cgi?id=1923663 Clear cookies for the google.com domain.
Desktop Failed update causes a "XULRunner" modal message box saying the platform version is not compatible https://bugzilla.mozilla.org/show_bug.cgi?id=1868951
Desktop Crash on YouTube livestreams https://bugzilla.mozilla.org/show_bug.cgi?id=1923864 We will ship a webcompat patch
Desktop www.tiktok.com - Activation captcha to solve a puzzle for login purposes does not respond to mouse drag action https://bugzilla.mozilla.org/show_bug.cgi?id=1924500 -
Desktop - - -

Known incident(s)

Firefox 132 Beta UI Toolbar Button Breakage
Description: Toolbars will be re-arranged in a surprising and unpleasant way after a restart. The bookmarks toolbar may not function. (sample case)
Status: Fixed with the release of version 132.0b2
Product(s) impacted: An unknown portion of the Firefox beta version 132 and Nightly version 133
Associated bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1919721
Resolution/workaround: Update to 132.0b2. If that doesn't help, follow these steps:
  • Update to the latest version of Beta/Dev edition.
  • Right-click the toolbar, select the Customize toolbar option, and choose Restore defaults in the lower right corner of that menu.
  • If they can’t see the bookmark toolbar, right-click the toolbar, choose the Bookmarks toolbar, and select the Always Show option.
Firefox 131 Enhanced Tracking Protection major breakage of multiple banks Bill Pay services
Description: Because of a bug in our CHIPS implementation, users are led to an error page stating You might have cookies blocked or cross-site tracking prevented when accessing bill pay section on their bank's website
Status: Fixed with the release of 131.0.3
Product(s) impacted: Firefox 131 and up
Associated bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1923500
Resolution/workaround: https://x.com/FirefoxSupport/status/1846463789740576859
Avast sending invalid ACKs over QUIC connections
Description: A recent version of Avast is sending invalid ACKs over QUIC connections. This was causing our networking code to panic and crash.
Status: Fixed with the release of 131.0.3
Product(s) impacted: Firefox 131 and up
Associated bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1923943
Resolution/workaround: A fix has rolled out in version 131.0.3
Google Auth broken by duplicate cookies
Description: Duplicate cookies caused by CHIPS will cause Google Auth to fail, blocking login to sites using Google Auth.
Status: On going
Product(s) impacted: Firefox 131 and up
Associated bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1923663
Impacted users: Forum threads
Resolution/workaround: https://x.com/FirefoxSupport/status/1846905439453364308

Post-release