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Firefox 155 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
- Desktop 155.0 Release Notes
- ESR 153.2.0 Release Notes
- ESR 140.15.0 Release Notes
- ESR 115.40.0 Release Notes
- Firefox for developers 155 Release Notes
- Firefox for Android 155.0 Release Notes
- Firefox for iOS 155.0 Release Notes
Dot releases
TBD
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 155
Firefox Desktop content update
| New captive portal detection domain | ||
|---|---|---|
| Description: | Update documentation (esp SUMO) for new captive portal detection domain | |
| Content request: | bug 2055787 | |
| KB article: | [1] | Article update |
| VPN - End of Summer promotion | ||
|---|---|---|
| Description: | Update VPN article to remove summer promotion | |
| Content request: | bug 2063035 | |
| KB article: | built-in-vpn | Article update |
| Smart window expansion to France and Mistral update | ||
|---|---|---|
| Description: | Smart window is expanding to France | |
| Content request: | bug 2060632, bug 2060618 | |
| KB articles: | smart-window | Article updates & new article |
| smart-window-safety | ||
| smart-window-memories | ||
| smart-window-byom | ||
| smart-window-user-feedback | ||
| smart-window-models | ||
Firefox for Android content update
No content update for this release.
Firefox for iOS content update
No content update for this release.
Known studies/experiments
| Platform | Studies/experiments | Description | Size | Related discussions | Forum tag |
|---|---|---|---|---|---|
| Firefox for iOS | Address bar interactive gesture to open the tab tray | This enables the interactive gesture on the bottom address bar. The user can drag the address bar interactively and open the tab tray or delete the current dragged tab. | 20% | - | UI/UX |
Top requests
Check out top voted requests on Mozilla Connect.
Known issues
| Platform | Issue | Known bug/Related discussions | Fix/workaround |
|---|---|---|---|
| Desktop | New Tab Recommended stories have automatically turned on for some users, and it's impossible to turn them off via the Customize menu | bug 2068165 | In Settings > Home and startup, under Firefox Home, re-enable and then disable stories again. |
| Android | Crashes spiked on Firefox for Android | bug 2036046 | TBD |
Known incidents
| HTTP/3 Sites Fail to Load When UDP Is Blocked | |
|---|---|
| Description: | Firefox fails to load some sites with network.http.happy_eyeballs_enabled=true on Zscaler proxy |
| Status: | Ongoing |
| Product(s) impacted: | Firefox Desktop |
| Associated bug: | [2] |
| Resolution/workaround: | We revert the changes temporarily per Aug 31 through Nimbus |
| Firefox 155 WebRender Hangs | |
|---|---|
| Description: | Firefox freezes on css blur filter for certain website(s) |
| Status: | Fix is coming |
| Product(s) impacted: | Firefox Desktop |
| Associated bug: | [3] |
| Resolution/workaround: | Regressor will be backed from the upcoming 155.0.1 release |