Support/Firefox151: Difference between revisions

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(→‎Firefox for iOS content update: remove additional table)
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== Dot releases ==
== Dot releases ==
TBD
<!--
{| class="wikitable"
{| class="wikitable"
|-
|-
! Platform !! Version !! Release date !! Notable fixes !! Unresolved
! Platform !! Version !! Release date !! Notable fixes !! Unresolved
|-
|-
| Firefox Desktop || [https://www.mozilla.org/firefox/149.0.1/releasenotes/ 149.0.1] || Jan 20, 2026 || [https://bugzilla.mozilla.org/ bugxxxxx], [https://bugzilla.mozilla.org/ bugxxxxx], [https://bugzilla.mozilla.org/ bugxxxxx] || -
| Firefox Desktop || [https://www.mozilla.org/firefox/151.0.1/releasenotes/ 151.0.1] || May 21, 2026 || [https://bugzilla.mozilla.org/show_bug.cgi?id=1950764 bug1950764], [https://bugzilla.mozilla.org/show_bug.cgi?id=2040754 bug2040754] || -
|-
| Firefox Desktop || [https://www.mozilla.org/firefox/151.0.2/releasenotes/ 151.0.2] || May 26, 2026 || Various bug fixes || -
|-
| Firefox for Android || [https://www.mozilla.org/firefox/android/151.0.1/releasenotes/ 151.0.1] || May 26, 2026 || [https://bugzilla.mozilla.org/show_bug.cgi?id=2041355 bug 2041355] || -
|-
| Firefox Desktop || [https://www.mozilla.org/firefox/151.0.3/releasenotes/ 151.0.3] || June 2, 2026 || [https://bugzilla.mozilla.org/show_bug.cgi?id=2041235 bug2041235], [https://bugzilla.mozilla.org/show_bug.cgi?id=2042454 bug2042454], and various [https://www.mozilla.org/en-US/security/advisories/mfsa2026-54/ security fixes] || -
|-
|-
| Firefox & Focus for Android || [https://www.mozilla.org/firefox/android/149.0.1/releasenotes/ 149.0.1] || Jan 20, 2026 || Various stability fixes || -
| Firefox for Android || [https://www.mozilla.org/firefox/android/151.0.3/releasenotes/ 151.0.3] || June 2, 2026 || [https://bugzilla.mozilla.org/show_bug.cgi?id=2042018 bug2042018], [https://bugzilla.mozilla.org/show_bug.cgi?id=2038467 bug2038467], and various [https://www.mozilla.org/en-US/security/advisories/mfsa2026-54/ security fixes] || -
<!--
|-
|-
| Firefox & Focus for iOS || 149.1 || Jan 20, 2026 || Various stability fixes || -
| Firefox & Focus for iOS || 149.1 || Jan 20, 2026 || Various stability fixes || -
-->
|}
|}
-->


== Contributor discussions ==
== Contributor discussions ==
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=== Firefox Desktop content update ===
=== Firefox Desktop content update ===
<!--
 
{| class="wikitable"
{| class="wikitable"
!colspan="3"|Feature name
!colspan="3"|Merge PDF section
|-
|-
|'''Description:'''
|'''Description:'''
|colspan="2"|Feature description
|colspan="2"|Add new PDF editing features to "view/edit" article: Merge (Firefox desktop 151) to SUMO article
|-
|-
|'''Content request:'''
|'''Content request:'''
|colspan="2"|Content request bugzilla
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2038255 bug 2038255]
|-
|-
|'''KB article:'''
|'''KB article:'''
|Article link
|[https://support.mozilla.org/kb/view-pdf-files-firefox-or-choose-another-viewer view-pdf-files-firefox-or-choose-another-viewer]
|New article/Article update
|Article update
|}
|}


{| class="wikitable"
{| class="wikitable"
!colspan="3"|Feature name
!colspan="3"|New tab update [Nova]
|-
|-
|'''Description:'''
|'''Description:'''
|colspan="2"|Feature description
|colspan="2"|Updates to New Tab SUMO pages for Nova
|-
|-
|'''Content request:'''
|'''Content request:'''
|colspan="2"|Content request bugzilla
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2030282 bug 2030282]
|-
|rowspan="3"|'''KB articles:'''
|[https://support.mozilla.org/kb/about-new-tab-page about-new-tab-page]
|rowspan="3"|Article update
|-
|-
|rowspan="2"|'''KB articles:'''
|[https://support.mozilla.org/kb/customize-items-on-firefox-new-tab-page customize-items-on-firefox-new-tab-page]
|Article link
|New article/Article update
|-
|-
|Article link
|[https://support.mozilla.org/kb/firefox-new-tab-widgets firefox-new-tab-widgets]
|New article/Article update
|}
|}


{| class="wikitable"
{| class="wikitable"
!colspan="3"|Feature name
!colspan="3"|Built-in VPN: Choose location
|-
|-
|'''Description:'''
|'''Description:'''
|colspan="2"|Feature description
|colspan="2"|Update the existing built-in VPN KB article to add locations
|-
|-
|'''Content request:'''
|'''Content request:'''
|colspan="2"|Content request bugzilla
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2031491 bug 2031491]
|-
|-
|rowspan="5"|'''KB articles:'''
|'''KB article:'''
|Article link
|[https://support.mozilla.org/kb/built-in-vpn built-in-vpn]
|rowspan="5"|New article/Article update
|Article update
|}
 
{| class="wikitable"
!colspan="3"|Model choices in Smart Window
|-
|-
|Article link
|'''Description:'''
|colspan="2"|Update "Model choices in Smart Window" sumo article
|-
|-
|Article link
|'''Content request:'''
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2038341 bug 2038341]
|-
|-
|Article link
|'''KB article:'''
|[https://support.mozilla.org/kb/smart-window-models smart-window-models]
|Article update
|}
 
{| class="wikitable"
!colspan="3"|GCI statement
|-
|-
|Article link
|'''Description:'''
|colspan="2"|-
|-
|'''Content request:'''
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2039950 bug 2039950]
|-
|'''KB article:'''
|[https://support.mozilla.org/kb/accessing-cloud-supported-features-firefox accessing-cloud-supported-features-firefox]
|New article
|}
 
{| class="wikitable"
!colspan="3"|Clear Private Browsing session (fire button)
|-
|'''Description:'''
|colspan="2"|Add a section to the Private Browsing page about the "Clear Private Browsing"/fire button
|-
|'''Content request:'''
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2039917 bug 2039917]
|-
|'''KB article:'''
|TBD
|Article update
|}
|}


-->
{| class="wikitable"
!colspan="3"|Built in VPN Territory expansion (June 2nd-June 3rd)
|-
|'''Description:'''
|colspan="2"|Firefox for Desktop is expanding VPN availability to more countries.
|-
|'''Content request:'''
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2041510 bug 2041510]
|-
|'''KB article:'''
|https://support.mozilla.org/en-US/kb/built-in-vpn
|Article update
|}


=== Firefox for Android content update ===
=== Firefox for Android content update ===
{| class="wikitable"
{| class="wikitable"
!colspan="3"|Shake to summarize on Android
!colspan="3"|Shake to summarize on Android
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|-
|-
|'''Content request:'''
|'''Content request:'''
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2022694]
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2022694 bug 2022694]
|-
|-
|'''KB article:'''
|'''KB article:'''
|[https://support.mozilla.org/en-US/kb/summarize-pages-android]
|[https://support.mozilla.org/kb/summarize-pages-android summarize-pages-android]
|New article
|New article
|}
|}
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|-
|-
|'''Content request:'''
|'''Content request:'''
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2030406]
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2030406 bug 2030406]
|-
|-
|'''KB article:'''
|'''KB article:'''
|[https://support.mozilla.org/en-US/kb/android-ai-controls]
|[https://support.mozilla.org/kb/android-ai-controls android-ai-controls]
|New article
|New article
|}
|}
<!--
 
{| class="wikitable"
{| class="wikitable"
!colspan="3"|Feature name
!colspan="3"|Built-in VPN on Android (moved to future version)
|-
|-
|'''Description:'''
|'''Description:'''
|colspan="2"|Feature description
|colspan="2"|VPN android early access
|-
|-
|'''Content request:'''
|'''Content request:'''
|colspan="2"|Content request bugzilla
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2030084 bug 2030084]
|-
|-
|'''KB article:'''
|'''KB article:'''
|Article link
|[https://support.mozilla.org/kb/placeholder-android-vpn placeholder-android-vpn]
|New article/Article update
|New article
|}
|}
-->


=== Firefox for iOS content update ===
=== Firefox for iOS content update ===
{| class="wikitable"
{| class="wikitable"
!colspan="3"|AI Controls on iOS
!colspan="3"|AI Controls on iOS
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|-
|-
|'''Content request:'''
|'''Content request:'''
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2030407]
|colspan="2"|[https://bugzilla.mozilla.org/show_bug.cgi?id=2030407 bug 2030407]
|-
|-
|'''KB article:'''
|'''KB article:'''
|[https://support.mozilla.org/en-US/kb/ios-ai-controls]
|[https://support.mozilla.org/kb/ios-ai-controls ios-ai-controls]
|New article
|New article
|}
|}
<!--
{| class="wikitable"
!colspan="3"|Feature name
|-
|'''Description:'''
|colspan="2"|Feature description
|-
|'''Content request:'''
|colspan="2"|Content request bugzilla
|-
|'''KB article:'''
|Article link
|New article/Article update
|}
-->


== Known studies/experiments ==
== Known studies/experiments ==
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-->
-->


== Top requests ==
== Product discussions on Mozilla Connect ==
Check out top voted requests on [https://connect.mozilla.org/ Mozilla Connect].
Check out top voted requests on [https://connect.mozilla.org/ Mozilla Connect].
* [https://connect.mozilla.org/t5/discussions/firefox-151-introduces-a-fresh-new-look-for-home-amp-new-tab/m-p/125766 A Fresh New Look for Home & New Tab (Desktop)]
* [https://connect.mozilla.org/t5/discussions/help-shape-tab-groups-on-firefox-mobile-for-android/td-p/123435 Help shape Tab Groups on Firefox Mobile for Android!]
* [https://connect.mozilla.org/t5/discussions/share-your-feedback-on-the-new-firefox-redesign/td-p/125218 Share Your Feedback on the New Firefox Redesign]
<!--
<!--
{| class="wikitable"
{| class="wikitable"
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== Known issues ==
== Known issues ==
<!--
 
{| class="wikitable"
{| class="wikitable"
|-
|-
! Platform !! Issue !! Known bug/Related discussions !! Fix/workaround
! Platform !! Issue !! Known bug/Related discussions !! Fix/workaround
|-
|-
| Desktop || - || - || -
| Desktop || VPN button becomes huge || [https://bugzilla.mozilla.org/show_bug.cgi?id=2042454 bug2042454] || Fixed in 151.0.3
|-
|-
| Android || - || - || -
| Android || Open tabs are also gone when browsing history is selected in Delete browsing data on quit || [https://bugzilla.mozilla.org/show_bug.cgi?id=2033285 bug2033285] || Fixed in 152
<!--
|-
|-
| iOS || - || - || -  
| iOS || - || - || -  
-->
|}
|}
-->


== Known incidents ==
== Known incidents ==
{| class="wikitable"
!colspan="2"| "Clear cache" prompt on Firefox Android Nightly
|-
|'''Description:'''
| Users are getting a system notification recommending they clear cache.
|-
|'''Status:'''
| Ongoing
|-
|'''Product(s) impacted:'''
| Firefox for Android (Nighlty version)
|-
|'''Associated bug:'''
| [https://bugzilla.mozilla.org/show_bug.cgi?id=2040753 bug2040753]
|-
|'''Resolution/workaround:'''
| TBD
|}
{| class="wikitable"
!colspan="2"| webserial failure to open port
|-
|'''Description:'''
| WebSerial can fail to open a port that was just closed
|-
|'''Status:'''
| Ongoing
|-
|'''Product(s) impacted:'''
| Firefox Desktop
|-
|'''Associated bug:'''
| [https://bugzilla.mozilla.org/show_bug.cgi?id=2040754 bug2040754]
|-
|'''Resolution/workaround:'''
| Will be fixed in the upcoming dot release
|}
{| class="wikitable"
!colspan="2"| Fire button doesn't appear
|-
|'''Description:'''
| The fire button to clear PBM session doesn't appear for the subset of users
|-
|'''Status:'''
| Fixed
|-
|'''Product(s) impacted:'''
| Firefox Desktop
|-
|'''Associated bug:'''
| [https://bugzilla.mozilla.org/show_bug.cgi?id=2040918 bug2040918]
|-
|'''Resolution/workaround:'''
| The Nimbus experiment has been fixed
|}
<!--
<!--
{| class="wikitable"
{| class="wikitable"

Latest revision as of 04:45, 3 June 2026

Mozilla L10n Main | About | Join SUMO | Meet the team | Releases information | Meetings | Blog | Resources


Firefox 151 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:

Note.png
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

Dot releases

Platform Version Release date Notable fixes Unresolved
Firefox Desktop 151.0.1 May 21, 2026 bug1950764, bug2040754 -
Firefox Desktop 151.0.2 May 26, 2026 Various bug fixes -
Firefox for Android 151.0.1 May 26, 2026 bug 2041355 -
Firefox Desktop 151.0.3 June 2, 2026 bug2041235, bug2042454, and various security fixes -
Firefox for Android 151.0.3 June 2, 2026 bug2042018, bug2038467, and various security fixes -

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 151

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

Firefox Desktop content update

Merge PDF section
Description: Add new PDF editing features to "view/edit" article: Merge (Firefox desktop 151) to SUMO article
Content request: bug 2038255
KB article: view-pdf-files-firefox-or-choose-another-viewer Article update
New tab update [Nova]
Description: Updates to New Tab SUMO pages for Nova
Content request: bug 2030282
KB articles: about-new-tab-page Article update
customize-items-on-firefox-new-tab-page
firefox-new-tab-widgets
Built-in VPN: Choose location
Description: Update the existing built-in VPN KB article to add locations
Content request: bug 2031491
KB article: built-in-vpn Article update
Model choices in Smart Window
Description: Update "Model choices in Smart Window" sumo article
Content request: bug 2038341
KB article: smart-window-models Article update
GCI statement
Description: -
Content request: bug 2039950
KB article: accessing-cloud-supported-features-firefox New article
Clear Private Browsing session (fire button)
Description: Add a section to the Private Browsing page about the "Clear Private Browsing"/fire button
Content request: bug 2039917
KB article: TBD Article update
Built in VPN Territory expansion (June 2nd-June 3rd)
Description: Firefox for Desktop is expanding VPN availability to more countries.
Content request: bug 2041510
KB article: https://support.mozilla.org/en-US/kb/built-in-vpn Article update

Firefox for Android content update

Shake to summarize on Android
Description: New SUMO article about Shake to Summarize feature on Android
Content request: bug 2022694
KB article: summarize-pages-android New article
AI controls on Android
Description: -
Content request: bug 2030406
KB article: android-ai-controls New article
Built-in VPN on Android (moved to future version)
Description: VPN android early access
Content request: bug 2030084
KB article: placeholder-android-vpn New article

Firefox for iOS content update

AI Controls on iOS
Description: New KB article for AI Controls on iOS
Content request: bug 2030407
KB article: ios-ai-controls New article

Known studies/experiments

Product discussions on Mozilla Connect

Check out top voted requests on Mozilla Connect.

Known issues

Platform Issue Known bug/Related discussions Fix/workaround
Desktop VPN button becomes huge bug2042454 Fixed in 151.0.3
Android Open tabs are also gone when browsing history is selected in Delete browsing data on quit bug2033285 Fixed in 152

Known incidents

"Clear cache" prompt on Firefox Android Nightly
Description: Users are getting a system notification recommending they clear cache.
Status: Ongoing
Product(s) impacted: Firefox for Android (Nighlty version)
Associated bug: bug2040753
Resolution/workaround: TBD
webserial failure to open port
Description: WebSerial can fail to open a port that was just closed
Status: Ongoing
Product(s) impacted: Firefox Desktop
Associated bug: bug2040754
Resolution/workaround: Will be fixed in the upcoming dot release
Fire button doesn't appear
Description: The fire button to clear PBM session doesn't appear for the subset of users
Status: Fixed
Product(s) impacted: Firefox Desktop
Associated bug: bug2040918
Resolution/workaround: The Nimbus experiment has been fixed

Post-release

Retrieved from "https://wiki.mozilla.org/index.php?title=Support/Firefox151&oldid=1257507"