Support/Firefox146
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Firefox 146 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:
To learn more about how to stay updated with Firefox release information, trending, and known issues, please also check out How to stay updated with Firefox release
Release notes
- Desktop 146.0 Release Notes
- ESR 115.31.0 Release Notes
- ESR 140.6.0 Release Notes
- Firefox for Enterprise 146 Release Notes
- Firefox for developers 146 Release Notes
- Firefox for Android 146.0 Release Notes
- Firefox for iOS 146.0 Release Notes
Dot releases
| Platform | Version | Release date | Notable fixes | Unresolved |
|---|---|---|---|---|
| Firefox Desktop | 146.0.1 | Dec 18, 2025 | Various bug fixes and security fixes | - |
| Firefox & Focus for Android | 146.0.1 | Dec 18, 2025 | Various bug fixes and security fixes | - |
Bug & feedback boards
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 on the same week we release a new Firefox version). Check our schedule here and don't hesitate to join the call in person if you can!
- Newsletter: Consider subscribing to Firefox Daily Digest to get daily updates (Mon-Fri) about Firefox from across the internet.
What's new in Firefox 146
Content in this page is being updated periodically as we're rolling out the release.
Firefox Desktop content update
| Firefox Backup tool (Windows) | ||
|---|---|---|
| Description: | Save your Firefox data with a backup file | |
| Content request: | https://bugzilla.mozilla.org/show_bug.cgi?id=1975254 | |
| KB article: | https://support.mozilla.org/kb/firefox-backup | New article |
| Firefox Labs update | ||
|---|---|---|
| Description: | Firefox Labs is available to all desktop users even though Telemetry or Studies are disabled | |
| Content request: | No content request. Related bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1972647 | |
| KB article: | https://support.mozilla.org/kb/firefox-labs-explore-experimental-features-firefox | Update |
| Firefox weather | ||
|---|---|---|
| Description: | Firefox weather availability update | |
| Content request: | https://bugzilla.mozilla.org/show_bug.cgi?id=1999716 https://bugzilla.mozilla.org/show_bug.cgi?id=1999745 | |
| KB article: | https://support.mozilla.org/kb/how-it-works-firefox-weather https://support.mozilla.org/en-US/kb/customize-items-on-firefox-new-tab-page |
Update |
Firefox for Android content update
| Android new tab tray | ||
|---|---|---|
| Description: | Explain the new tab tray design | |
| Content request: | https://bugzilla.mozilla.org/show_bug.cgi?id=2001641 | |
| KB article: | https://support.mozilla.org/kb/manage-multiple-tabs-firefox-android | New article |
Firefox for iOS content update
Known studies/experiments
Top requests
Known issues
| Platform | Category | Issue | Known bug/Related discussions | Fix/workaround |
|---|---|---|---|---|
| Desktop | UI/UX | Selection color for items in the Sidebar and Library is too bright in the dark mode | bug 2005430, browser-appearance tag | - |
| Desktop | UI/UX | A thin strip remains between a maximized Firefox window and the screen edge on external monitors | bug 1993474, browser-appearance tag | Fixed in v147 |
| Desktop | Profiles | Profiles created via the legacy Profile manager do not show up in the Profiles menu | bug 1996240 | Use the legacy Profile manager; the fix should come soon |
| Desktop | Profiles | The Refresh Firefox feature is disabled with the release of the new profile management system | bug 1928138 | - |
| Desktop | Sidebar | Microphone permission prompt is not displayed for sidebar chatbots | bug 1982956 | Give the website a persistent permission in a regular tab |
| Desktop | Webcompat | Facebook audio and video call isn't working in Firefox | bug 1896361 | - |
| Android | UI/UX | Review prompt is displayed too often for some users | bug 2001801 bug 2004459 | Temporary fix (disabling the prompt) is coming in the next dot release next week; the initial cause is still unknown |
| Android | UI/UX | Empty strip remains and stories section cut when scrolling on homescreen with the toolbar set to top with composable toolbar disabled | bug 1998100 | Fixed in v145.0.1 |
| Android | UI/UX | Android shortcuts no longer displayed in carousel view | - | This is an intentional change introduced in 144 |
| iOS | UI/UX | Send tab functionality is missing | [1] | Unknown |
| iOS | UI/UX | Google search shows a download app message | [2] | Unknown |