Support/Firefox126

Firefox 126 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

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

What's new in Firefox 126

Firefox Desktop

Guidance notification on how to set Firefox as a default browser (Windows only)
Description:	Users are no longer able to set Firefox as the default browser with one click – Windows is forcing users to navigate to the Windows Setting. In response, we are planning to land a "Guidance notification" in Fx126 to help educate users in the process and on the notifications there is a "show me how" that will lead to a SUMO page to explain.
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1890429
KB article:	https://support.mozilla.org/kb/how-change-your-default-browser-firefox-windows	KB updated

Firefox for Android

String changes - add-ons > extensions
Description:	All “add-ons” copy will be changed to “extensions” moving forward.
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1890882
KB articles:	https://support.mozilla.org/kb/find-and-install-add-ons-firefox-android	KB updated
	https://support.mozilla.org/kb/uninstall-firefox-android-add-ons
	https://support.mozilla.org/kb/install-firefox-relay-extension-firefox-android
	https://support.mozilla.org/kb/how-do-i-choose-what-information-sync-firefox
	https://support.mozilla.org/kb/how-firefox-android-use-permissions-it-requests
	https://support.mozilla.org/kb/mobile-accessibility-features

Full Page translations
Description:	Firefox Translations is the in-browser Translation features that allow Firefox users translate full webpage content in 16 languages
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1855500
KB article:	https://support.mozilla.org/kb/android-translation	New KB

Firefox for iOS

No content updates for v126

Known studies/experiments

Platform	Studies/experiments	Description
iOS	App Customization in iOS	Adding lightmode/darkmode and the option to choose your toolbar location during onboarding in the hopes to drive Daily Active Users. This is rolling out to 50% of all users.
iOS	Splash screen Experiment	Splashscreen has an animation, and it will be displayed for an X amount of minutes in order to allow app to load experiments. This is only shown on very first launch of app. For accessibility, we will show the animation in slow motion. This is also rolling out to 50% of all users. Please keep an eye out of users reporting about app slowness.

Release notes

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

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.

Escalation

TBD

Heads up

• Firefox for Android Nightly: The team is testing a change to video streaming in Firefox for Android Nightly. If you see any Nightly users report problems with video streaming, it might be related to this change (discussion thread).

Dot releases

Platform	Version	Release date	Notable fixes
Desktop	126.0.1	May 28, 2024	Bug1894849, Bug1896097, Bug1897115, and Bug1897006.
Android	126.0.1	May 28, 2024	-

Trending issue(s)

Platform	Issue	Known bug	Fix/workaround
Desktop/Android/iOS	-	-	-

Known incident(s)

Twitter/X is broken with ETP strict mode
Status:	Resolved for all versions above 114. See our status update.
Product(s) impacted:	Firefox desktop, Firefox for Android, Firefox for iOS
Associated bug:	https://bugzilla.mozilla.org/show_bug.cgi?id=1897379
Resolution/workaround:	Workaround for iOS 126.1 that still see x.com blocked: Open settings > Data Management Enable only the Tracking Protection switch Hit Clear Private Data button Reload x.com tab

Desktop language pack issue
Status:	Resolved as per May 29, 2024. See here
Product(s) impacted:	Firefox desktop
Associated bug:	https://bugzilla.mozilla.org/show_bug.cgi?id=1899255
Resolution/workaround:	Updating to 126.0.1 should solve the issue. Otherwise, users on 126.0 will be able to resolve this issue by using the 126.0.2 langpacks.

Android performance degradation
Status:	Fixed with the 128 release. See here.
Product(s) impacted:	Firefox for Android
Associated bug:	https://bugzilla.mozilla.org/show_bug.cgi?id=1892230
Resolution/workaround:	This should be fixed with the release of 128

Post-release

• Release report (TBD)