141.0 Firefox Release
July 22, 2025
Version 141.0, first offered to Release channel users on July 22, 2025
New
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.
Animation showing the Firefox browser with the Smart Tabs feature being used
This feature is part of a progressive roll out.
What is a progressive roll out?
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.
screenshot Firefox browser with the sidebar enabled, demonstrating the divider for extra icons
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.
screenshot of the address bar with a conversion from Celsius to Fahrenheit in progress
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
Fixed
Various security fixes.
Changed
Firefox on Windows 11 now uses system provided font icons for the caption buttons, more in line with Windows 11 conventions.
Enterprise
You can find information about policy updates and enterprise specific bug fixes in the Firefox for Enterprise 141 Release Notes.
Developer
Developer Information
Firefox will now also clear the back-forward-cache when receiving the Clear-Site-Data: "cache" response header.
Web Platform
Enabled the WebGPU API (spec; MDN) on Windows. For details, see the Mozilla Graphics Team Blog.
Implemented the closedby attribute and it's related closedBy property on dialogs indicating the types of user actions that can be used to close the associated <dialog> element.
Support for Cookies Having Independent Partitioned State (CHIPS) is now re-enabled, allowing developers to opt a cookie into storage partitioning per top-level site.
The HTMLElement.showPopover() and HTMLElement.togglePopover() methods now take an options.source argument referencing the popover invoker, and togglePopover() also takes a force resp. options.force argument to force the popover open or closed.