Firefox 138 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 & feedback boards
Dot releases
Platform |
Version |
Release date |
Notable fixes |
Unresolved |
Reddit forum
|
Firefox Desktop |
138.0.1 |
May 1, 2025 |
bug1963537, bug1961710 |
- |
[1]
|
Firefox & Focus for Android |
138.0.2 |
May 6, 2025 |
Fixed a PiP bug (bug1956165 and various stability fixes |
-
|
Firefox Desktop and Firefox/Focus/Klar for Android |
138.0.3 |
May 13, 2025 |
bug1961191, bug1924241, bug1961610, bug1952611 |
- |
[2]
|
Firefox Desktop and Firefox/Focus/Klar for Android |
Firefox 138.0.4, ESR 115.23.1, ESR 128.10.1 |
May 17, 2025 |
Security fixes |
- |
[3]
|
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
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Content in this page is being updated periodically as we're rolling out the release.
What's new in Firefox 138
Firefox Desktop
Firefox for Android
Firefox for iOS
Known studies/experiments
Escalation
TBD
Known issue(s)/Trending topic(s)
Platform |
Issue |
Known bug/Related discussions |
Fix/workaround
|
Desktop |
Sidebar bookmarks no longer open automatically since the last update |
Bug1963549 |
-
|
Desktop |
Twitch stopped working on Firefox ESR 115 |
Bug1967582, Reddit thread |
See [4]
|
Android |
Unexpected client auth certificate request dialog on Android |
Bug1966033 |
Fix will land on version 140
|
Android |
Keyboard popping up automatically when user launch Firefox for Android |
It's related to an experiment which should've been ended by now |
No further action needed from the user. Should be back to normal automatically.
|
Android |
Translation feature disparity for CJK languages |
[5] |
Users can access these languages on the Beta version while team is working on improving the models for Android
|
iOS |
User is redirected to Google app after force-closing and reopening Firefox if a Google search is open |
[6] |
-
|
Known incident(s)
New tab page blank even when set to Firefox Home in 138.0
|
Description:
|
Some users experience an issue with the new tab is showing blank page despite settings being set to Firefox Home.
|
Status:
|
Solved
|
Product(s) impacted:
|
Firefox Desktop 138
|
Associated bug:
|
https://bugzilla.mozilla.org/show_bug.cgi?id=1963537
|
Resolution/workaround:
|
Update to 138.0.1
|
Post-release