Latest revision as of 07:42, 23 June 2025

Firefox 139 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:

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Release notes

Dot releases

Platform	Version	Release date	Notable fixes	Unresolved
Firefox Desktop	139.0.1	May 29, 2025	Graphics corruption with certain NVIDIA graphics adapter and multiple monitors running at mixed refresh rates after updating to Firefox 139 (bug1968876)	-
Firefox & Focus for Android	139.0.2	June 3, 2025	Fixed the "Translate page" menu option sometimes not consistently appearing when expected. (Bug 1965261)	-
Firefox & Focus for Android	139.0.3	June 4, 2025	Mitigated a recently-disclosed privacy leak. The leak was caused by other apps installed on the phone that created and listened on ports accessed by the browser.	-
Firefox Desktop	139.0.4	June 10, 2025	Various bugs and security fixes	-
Firefox & Focus for Android	139.0.4	June 10, 2025	Various security fixes and further enhancement to the Local Mess privacy leak.	-

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:

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What's new in Firefox 139

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

Firefox Desktop content update

Sidebar article update
Description:	Update to the sidebar article to remove How can we improve the sidebar and vertical tabs?
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1963913
KB article:	https://support.mozilla.org/kb/use-sidebar-access-tools-and-vertical-tabs	Article update

Chrome import changes on Windows
Description:	Article update due to a recent change in how Chrome encrypts data
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1965232
KB articles:	https://support.mozilla.org/kb/import-bookmarks-google-chrome	Article update
KB articles:	https://support.mozilla.org/kb/import-data-another-browser	Article update

Firefox for Android content update

No content update

Firefox for iOS content update

Unified Privacy panel rollout
Description:	New unified privacy panel in iOS
Content request:	https://bugzilla.mozilla.org/show_bug.cgi?id=1966734
KB article:	https://support.mozilla.org/kb/enhanced-tracking-protection-firefox-ios	Article updated

Known studies/experiments

Platform	Studies/experiments	Description	Related discussions	Forum tag
Firefox for Android	Android tablet address bar moved on top of the screen	-	[1]	browser-appearance
Firefox for Android	Search box in the middle of home screen		-	-
Firefox for Android	Remove all content (including Jump Back In, Bookmarks, Recently Visited) from home screen except Shortcuts and Stories	-	-	-

Known issuess

Platform	Issue	Known bug/Related discussions	Fix/workaround
Desktop	Password from Chrome are not imported with the migration wizard	bug1960560	A fix is coming in version 139
Desktop	NYT tells me I am a bot and will not let me read articles	#162420	Investigating
Desktop	Taskbar Appearing when playing Full Screen Videos	bug1964241	See [2]
Android	Back button jumps to first entry in tab's history rather than previous entry	bug1958609	Fix is coming in version 139
Android	Don't show the empty state while bookmarks are loading	bug1957713	Fix will land in version 140
Android	Unexpected client auth certificate request dialogs	bug1966033	Fix will land in version 140
Android	spacebar and backspace working abnormaly in google search bar	bug1968872	Investigating
Android	Landscape mode on Android tablets doesn't show up in full screen	bug1969918	Looks like a device-specific issue (only impact users on Vivo tablet)
Android	Broken web address autocompletion	[3]	We found out that the feature was recently removed
Android Nightly	Unable to disable private tab locking in Firefox Nightly	bug1965720	User can disable the lock by going to Settings - Private browsing and disable the "Use screen lock to hide tabs in private browsing" option.
iOS	User is redirected to Google app after force-closing and reopening Firefox if a Google search is open	https://github.com/mozilla-mobile/firefox-ios/issues/26361	Investigating

Top requests

Platform	Request	Related discussions	Status
Desktop	Differentiate "Site you save" and "Sites you visit" in new tab	[4] [5]	Tracking
Android	Android address bar is too cluttered	[6] [7]	Tracking
iOS	Default page zoom setting	[8]	In progress
iOS	Translate feature in Firefox for iOS	[9]	Tracking

Known incident(s)

Issue with multiple monitors with different refresh rates on Windows
Description:	Multiple monitor refresh rates cause severe glitching/artifacting on Windows desktop
Status:	Resolved
Product(s) impacted:	Firefox Desktop on Windows
Associated bug:	[10]
Resolution/workaround:	We released 139.0.1 to fix this issue

Improper link navigation via URL parameter on Android
Description:	For URLs including a "link" parameter, Firefox navigates to the value of "link" instead of opening the domain
Status:	Ongoing
Product(s) impacted:	Firefox Desktop/Android/iOS
Associated bug:	[11] (originally reported on Mastodon)
Resolution/workaround:	Fixed on Nightly 141.0a1

@@ Line 157: / Line 157: @@
 ! Platform !! Studies/experiments !! Description !! Related discussions !! Forum tag
 |-
-| Firefox for Android || Android tablet address bar moved on top of the screen || - || [https://connect.mozilla.org/t5/discussions/android-tablet-address-bar-location] || -
+| Firefox for Android || Android tablet address bar moved on top of the screen || - || [https://connect.mozilla.org/t5/discussions/android-tablet-address-bar-location/m-p/98141#M38217] || [https://support.mozilla.org/questions/mobile?tagged=browser-appearance browser-appearance]
 |-
 | Firefox for Android || Search box in the middle of home screen || [[File:Screen Shot 2025-05-28 at 8.35.07 AM.png|thumb]] || - || -
@@ Line 164: / Line 164: @@
 |}
-== Known/Trending issues(s) ==
+== Known issuess ==
 {| class="wikitable"
 |-
@@ Line 170: / Line 170: @@
 |-
 | Desktop || Password from Chrome are not imported with the migration wizard || [https://bugzilla.mozilla.org/show_bug.cgi?id=1960560 bug1960560] || A fix is coming in version 139
+|-
+| Desktop || NYT tells me I am a bot and will not let me read articles || [https://webcompat.com/issues/162420 #162420] || Investigating
+|-
+| Desktop || Taskbar Appearing when playing Full Screen Videos || [https://bugzilla.mozilla.org/show_bug.cgi?id=1964241 bug1964241] || See [https://support.mozilla.org/questions/1509304#answer-1741398]
 |-
 | Android || Back button jumps to first entry in tab's history rather than previous entry || [https://bugzilla.mozilla.org/show_bug.cgi?id=1958609 bug1958609] || Fix is coming in version 139
@@ Line 178: / Line 182: @@
 |-
 | Android || spacebar and backspace working abnormaly in google search bar || [https://bugzilla.mozilla.org/show_bug.cgi?id=1968872 bug1968872] || Investigating
+|-
+| Android || Landscape mode on Android tablets doesn't show up in full screen || [https://bugzilla.mozilla.org/show_bug.cgi?id=1969918 bug1969918] || Looks like a device-specific issue (only impact users on Vivo tablet)
+|-
+| Android || Broken web address autocompletion || [https://support.mozilla.org/questions/1513828] || We found out that the feature was recently removed
 |-
 | Android Nightly || Unable to disable private tab locking in Firefox Nightly || [https://bugzilla.mozilla.org/show_bug.cgi?id=1965720 bug1965720] || User can disable the lock by going to Settings - Private browsing and disable the "Use screen lock to hide tabs in private browsing" option.
+|-
+| iOS || User is redirected to Google app after force-closing and reopening Firefox if a Google search is open || https://github.com/mozilla-mobile/firefox-ios/issues/26361 || Investigating
 |}
@@ Line 186: / Line 196: @@
 |-
 ! Platform !! Request !! Related discussions !! Status
+|-
+| Desktop || Differentiate "Site you save" and "Sites you visit" in new tab || [https://connect.mozilla.org/t5/ideas/please-split-quot-sites-you-save-and-visit-quot-into-two-options/idi-p/12734] [https://www.reddit.com/r/firefox/comments/1kxp38p/i_think_the_sticker_icon_on_shortcuts_in_the_new/] || Tracking
+|-
+| Android || Android address bar is too cluttered || [https://connect.mozilla.org/t5/ideas/remove-share-button-in-address-bar/idi-p/96769] [https://www.reddit.com/r/firefox/comments/1l26s5d/now_on_the_android_firefox_browser_the_risk_of/] || Tracking
 |-
 | iOS || Default page zoom setting || [https://github.com/mozilla-mobile/firefox-ios/issues/15058] || In progress
@@ Line 192: / Line 206: @@
 |}
-== Investigating ==
+== Known incident(s) ==
 {| class="wikitable"
+!colspan="2"| Issue with multiple monitors with different refresh rates on Windows
 |-
-! Platform !! Issue !! Known bug/Related discussions !! Fix/workaround
+|'''Description:'''
+| Multiple monitor refresh rates cause severe glitching/artifacting on Windows desktop
 |-
-| Desktop || Taskbar Appearing when playing Full Screen Videos || [https://bugzilla.mozilla.org/show_bug.cgi?id=1964241 bug1964241] || See [https://support.mozilla.org/questions/1509304#answer-1741398]
+|'''Status:'''
+| Resolved
 |-
-| Android || Landscape mode on Android tablets doesn't show up in full screen || [https://bugzilla.mozilla.org/show_bug.cgi?id=1969918 bug1969918] || Looks like a device-specific issue (only impact users on Vivo tablet)
+|'''Product(s) impacted:'''
+| Firefox Desktop on Windows
 |-
-| Android || Broken web address autocompletion || [https://support.mozilla.org/questions/1513828] || We found out that the feature was recently removed
+|'''Associated bug:'''
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1968876]
 |-
-| iOS || User is redirected to Google app after force-closing and reopening Firefox if a Google search is open || https://github.com/mozilla-mobile/firefox-ios/issues/26361 || Investigating
+|'''Resolution/workaround:'''
+| We released [https://www.mozilla.org/firefox/139.0.1/releasenotes/ 139.0.1] to fix this issue
 |}
-== Known incident(s) ==
 {| class="wikitable"
-!colspan="2"| Issue with multiple monitors with different refresh rates on Windows
+!colspan="2"| Improper link navigation via URL parameter on Android
 |-
 |'''Description:'''
-| Multiple monitor refresh rates cause severe glitching/artifacting on Windows desktop
+| For URLs including a "link" parameter, Firefox navigates to the value of "link" instead of opening the domain
 |-
 |'''Status:'''
-| Resolved
+| Ongoing
 |-
 |'''Product(s) impacted:'''
-| Firefox Desktop on Windows
+| Firefox Desktop/Android/iOS
 |-
 |'''Associated bug:'''
-| [https://bugzilla.mozilla.org/show_bug.cgi?id=1968876]
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1970151] (originally reported on [https://cloudisland.nz/@xssfox/114682039224875223 Mastodon])
 |-
 |'''Resolution/workaround:'''
-| We released [https://www.mozilla.org/firefox/139.0.1/releasenotes/ 139.0.1] to fix this issue
+| Fixed on Nightly 141.0a1
 |}

Support/Firefox139: Difference between revisions