Support/Firefox129

Firefox 129 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:

• Answer questions in the support forum
• Write help articles
• Localize support content
• Provide support on social media channels
• Respond to mobile store reviews

Release notes

• Firefox Desktop
• Firefox ESR 115.14.0
• Firefox ESR 128.1.0
• Firefox for developers
• Firefox for Android
• Firefox for iOS

Dot releases

Platform	Version	Release date	Notable fixes	Unresolved
Firefox Desktop	129.0.1	August 13, 2024	bug1911283, bug1908969, bug1910990	-
Firefox Desktop	129.0.2	August 20, 2024	bug1908873, bug1911486	-
Firefox & Focus for Android	129.0.2	August 20, 2024	Various stability fixes	-
Firefox & Focus for iOS	129.2	August 20, 2024	Various stability fixes	-

Contributor discussions

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

• Desktop release discussion
• Mobile release discussion
• Localization discussion
• Support release scrum meeting

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.

Content in this page is being updated periodically as we're rolling out the release.

What's new in Firefox 129

Firefox Desktop

Reader View with enhanced Text and layout menu
Description:	The look and feel of the menus in Desktop Reader View have been updated. New functionality has been added, including the ability to add custom color schemes and additional text formatting options. We want to increase the comfort (and accessibility) of using the reader by making the type controls support all the options in the WCAG success criteria for text spacing, allowing users to pick their preferred fonts and allowing custom colors.
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1910697
KB article:	https://support.mozilla.org/en-US/kb/firefox-reader-view-clutter-free-web-pages	Article updated

Extending linux install SUMO page with AppArmor profile info for non packaged installations
Description:	Our sandbox code makes use of unprivileged user namespaces when creating new processes for enforcing more security. This feature can in some context be considered a security risk, thus some distribution started to restrict its usage and only allow it to selected binaries via AppArmor profiles.
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1899705
KB article:	https://support.mozilla.org/en-US/kb/install-firefox-linux	Article updated

Update to the clear history dialog
Description:	There is a new UI for the clear history dialog, with new clearing options, and functionality. Users can now see how much data they are clearing for cookies and cache based on the time range they select to clear. Additionally, the dialog has been unified through all entry points for clearing history (hamburger menu, about:preferences#privacy --> clear data, clear history, clear on shutdown). The clear site data dialog will have it's own clear options remembering, separate from clear history and clear on shutdown. The new dialog will be enabled by default.
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1904392
KB articles:	https://support.mozilla.org/en-US/kb/changes-tab-context-menu-firefox-78	KB will be updated
	https://support.mozilla.org/en-US/kb/tabs-organize-websites-single-window
	https://support.mozilla.org/en-US/kb/tab-overview-menu

ECH via OS DNS Resolver
Description:	Changes for SUMO articles on Encrypted Client Hello for new toggles
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1892240
KB articles:	https://support.mozilla.org/en-US/kb/faq-encrypted-client-hello	KB updated
	https://support.mozilla.org/en-US/kb/understand-encrypted-client-hello

Enable Address Autofill for DE and FR
Description:	The address autofill feature will be available for users in France and Germany as of Fx 129. It is currently available for users located in the US and Canada.
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1908477
KB article:	https://support.mozilla.org/en-US/kb/automatically-fill-your-address-web-forms	Article updated

How to set Firefox as your mail-to default
Description:	We will provide prompts (for users that have set Firefox as their default browser) for: - Firefox to be set as the Windows OS default handler for mail sites - The mail site to be set as the default handler for mail links
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1910137
KB article:	Link TBD	New article will be created

Firefox for Android

Ability to do offline translations
Description:	Users will have the ability to download languages for offline translations
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1909913
KB article:	https://support.mozilla.org/en-US/kb/android-translation	Updated article

Firefox for iOS

Private Tab Persistance - Bring back "Close Private tabs" option
Description:	The option is by default ON, meaning that all private tabs will be closed after app closing. If the user wants, they can turn it off and persist their tabs.
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1910913
KB articles:	https://support.mozilla.org/en-US/kb/automatically-close-private-tabs-when-leaving-priv	Article updated

Known studies/experiments

Platform	Studies/experiments	Description	Feedback collection
Firefox desktop	-	-

Escalation

TBD

Trending/known issue(s)

Platform	Issue	Known bug	Fix/workaround	Associated inbound
Desktop	Tiktok - can't comment on livestream	Bugzilla	-
Android	Tiktok video doesn't load	Bugzilla	-
Desktop	Address bar stops working after a while until firefox restart with Avast installed	Bugzilla	Avast issued a hotfix on Aug 28	Desktop bug board

Known incident(s)

Firefox iOS back button intermittent issue
Description:	After rebooting the app, navigation within the active tab does not enable the back arrow properly. However If you open a new tab, the navigation there works.
Status:	fixed using Firefox iOS v129.1
Product(s) impacted:	Firefox iOS users on v129.0
Associated bug:	-
Resolution/workaround:	Release 129.1 and fix #20831 in a later release

Hulu playback appears to be broken for some content
Status:	Fixed with the release of 129.0.1
Product(s) impacted:	Firefox desktop
Associated bug:	https://bugzilla.mozilla.org/show_bug.cgi?id=1911283
Resolution/workaround:	Fixed with the release of 129.0.1

YouTube slow/unusable on ESR (Reddit thread)
Status:	Fixed
Product(s) impacted:	Firefox ESR, especially version 115
Associated bug:	https://bugzilla.mozilla.org/show_bug.cgi?id=1811750#c13
Resolution/workaround:	YouTube rolled back the change that triggered this