Firefox 141 Released

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.

Version 141.0, first offered to Release channel users on July 22, 2025

• Now Firefox can help you keep your tabs organized, automatically. A local AI model identifies similar tabs, automatically organizes them into groups, and even suggests group names. Everything happens on your device to respect your privacy. Learn more here.

  

  

  This feature is part of a progressive roll out.

  What is a progressive roll out?

  Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience.

• Vertical tabs users can now adjust the size of the tools areas at the bottom of the sidebar. To see fewer tools and more tabs, drag down the divider line which pushes extra tools into an overflow menu.

  

• On Linux, Firefox uses less memory and no longer requires a forced restart after an update has been applied by a package manager.

• Address autofill has been enabled for users in Brazil, Spain and Japan.

• The Firefox address bar can now be used as a unit converter. The unit converter supports converting units of length, temperature, mass, force, and angular measurement, as well as timezones (e.g. “now in GMT” , “10am EDT to CET”). Selecting the result will copy it to your clipboard. Learn more here.

  

• Firefox builds in Valencian now come with a built-in Catalan (Valencian variant) dictionary for the Firefox spellchecker.

• The following languages are now available for translation:

  • Albanian
  • Gujarati
  • Hebrew
  • Hindi
  • Kannada
  • Malay
  • Malayalam
  • Persian
  • Telugu

• Firefox on Windows 11 now uses system provided font icons for the caption buttons, more in line with Windows 11 conventions.

• Firefox will now also clear the back-forward-cache when receiving the Clear-Site-Data: "cache" response header.

• With the release of Firefox 141, we are pleased to welcome the developers who contributed their first code change to Firefox in this release, 12 of whom were brand new volunteers! Please join us in thanking each of these diligent and enthusiastic individuals, and take a look at their contributions:

  • ales.astone: 1920385, 1968910
  • Chris Vander Linden: 1888847
  • Gabriel Astorgano[:astor}: 1911190
  • Jelte Fennema: 1945951
  • Mr. Beedell, Roke Julian Lockhart (RJLB): 1969599
  • Nick Crast: 1965895
  • Sajid Anwar [:sajidanwar]: 825197, 1969770
  • Simon Wülker: 1971080
  • Skye Green [:skyevg]: 1965646
  • viet-hung.nhu: 1968288
  • wilsu: 1956211
  • наб: 1970690

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