| Version | Change log |
| Utilu Mozilla Firefox Collection 141.0 Jul 21, 2025 |
New: On Linux Firefox uses less memory and no longer requires a forced restart after an update has been applied by a package manager. Developer: Firefox will now also clear the back-forward-cache when receiving the Clear-Site-Data: "cache" response header. Web Platform: 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. |
| Utilu Mozilla Firefox Collection 140.0.4 Jul 8, 2025 |
New: On Linux Firefox uses less memory and no longer requires a forced restart after an update has been applied by a package manager. Developer: Firefox will now also clear the back-forward-cache when receiving the Clear-Site-Data: "cache" response header. Web Platform: 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. |
| Utilu Mozilla Firefox Collection 140.0.2 Jun 30, 2025 |
New: You can now unload tabs by right-clicking on a tab (or multiple selected tabs) and selecting "Unload Tab". This can be helpful in reducing Firefox's memory and CPU usage. Firefox for Android now allows includes a "Select All" in Bookmarks. Vertical Tabs: You can now keep more — or fewer — pinned tabs in view. Just drag the divider to resize your pinned tabs section. Firefox now supports adding custom search engines. To do so, right-click a search field of a supported website and select Add Search Engine, or go to Settings > Search > Add (below the search shortcuts table) to manually enter a search URL. The Firefox Extensions button can now be removed from the toolbar, giving you more control over how you customize your browser. When the button is hidden, you can access the extensions panel again at any time from the Firefox menu by clicking the Extensions menu item. Firefox builds in Arabic now come with a built-in Arabic dictionary for the Firefox spellchecker. You can now lock your private browsing tabs behind your fingerprint or device credentials for added privacy. Enable the setting in Firefox for Android to keep your private tabs secure even when you leave the app. Full-Page Translations now prioritize translating only the content near your current view, improving speed and responsiveness. Content outside your view is skipped unless you scroll to it, reducing unnecessary resource usage. Changed: The Pocket toolbar icon, as well as the Pocket integrations on New Tab, have been removed per the service shutdown announcement. Web Platform: Service Workers are now available in Private Browsing Mode. This enhancement builds on our efforts to support IndexedDB and the DOM Cache API in Private Browsing through encrypted storage. With this change, more websites, especially those that rely on background tasks, will be able to benefit from Service workers. Added Platform support for aria-keyshortcuts in Linux, MacOS, and Windows. Added |
| Utilu Mozilla Firefox Collection 140.0 Jun 23, 2025 |
New: You can now unload tabs by right-clicking on a tab (or multiple selected tabs) and selecting "Unload Tab". This can be helpful in reducing Firefox's memory and CPU usage. Firefox for Android now allows includes a "Select All" in Bookmarks. Vertical Tabs: You can now keep more — or fewer — pinned tabs in view. Just drag the divider to resize your pinned tabs section. Firefox now supports adding custom search engines. To do so, right-click a search field of a supported website and select Add Search Engine, or go to Settings > Search > Add (below the search shortcuts table) to manually enter a search URL. The Firefox Extensions button can now be removed from the toolbar, giving you more control over how you customize your browser. When the button is hidden, you can access the extensions panel again at any time from the Firefox menu by clicking the Extensions menu item. Firefox builds in Arabic now come with a built-in Arabic dictionary for the Firefox spellchecker. You can now lock your private browsing tabs behind your fingerprint or device credentials for added privacy. Enable the setting in Firefox for Android to keep your private tabs secure even when you leave the app. Full-Page Translations now prioritize translating only the content near your current view, improving speed and responsiveness. Content outside your view is skipped unless you scroll to it, reducing unnecessary resource usage. Changed: The Pocket toolbar icon, as well as the Pocket integrations on New Tab, have been removed per the service shutdown announcement. Web Platform: Service Workers are now available in Private Browsing Mode. This enhancement builds on our efforts to support IndexedDB and the DOM Cache API in Private Browsing through encrypted storage. With this change, more websites, especially those that rely on background tasks, will be able to benefit from Service workers. Added Platform support for aria-keyshortcuts in Linux, MacOS, and Windows. Added |
| Utilu Mozilla Firefox Collection 139.0.4 Jun 10, 2025 |
New: You can now unload tabs by right-clicking on a tab (or multiple selected tabs) and selecting "Unload Tab". This can be helpful in reducing Firefox's memory and CPU usage. Firefox for Android now allows includes a "Select All" in Bookmarks. Vertical Tabs: You can now keep more — or fewer — pinned tabs in view. Just drag the divider to resize your pinned tabs section. Firefox now supports adding custom search engines. To do so, right-click a search field of a supported website and select Add Search Engine, or go to Settings > Search > Add (below the search shortcuts table) to manually enter a search URL. The Firefox Extensions button can now be removed from the toolbar, giving you more control over how you customize your browser. When the button is hidden, you can access the extensions panel again at any time from the Firefox menu by clicking the Extensions menu item. Firefox builds in Arabic now come with a built-in Arabic dictionary for the Firefox spellchecker. You can now lock your private browsing tabs behind your fingerprint or device credentials for added privacy. Enable the setting in Firefox for Android to keep your private tabs secure even when you leave the app. Full-Page Translations now prioritize translating only the content near your current view, improving speed and responsiveness. Content outside your view is skipped unless you scroll to it, reducing unnecessary resource usage. Changed: The Pocket toolbar icon, as well as the Pocket integrations on New Tab, have been removed per the service shutdown announcement. Web Platform: Service Workers are now available in Private Browsing Mode. This enhancement builds on our efforts to support IndexedDB and the DOM Cache API in Private Browsing through encrypted storage. With this change, more websites, especially those that rely on background tasks, will be able to benefit from Service workers. Added Platform support for aria-keyshortcuts in Linux, MacOS, and Windows. Added |
| Utilu Mozilla Firefox Collection 139.0.1 Jun 3, 2025 |
Fixed: Fixed graphics corruption with certain NVIDIA graphics adapters and multiple monitors running at mixed refresh rates after updating to Firefox 139. (Bug 1968876) |
| Utilu Mozilla Firefox Collection 139.0 May 26, 2025 |
Security fixes: CVE-2025-4920: Out-of-bounds access when resolving Promise objects CVE-2025-4921: Out-of-bounds access when optimizing linear sums |
| Utilu Mozilla Firefox Collection 138.0.1 May 2, 2025 |
Fixed: Fixed an issue which caused a blank page to be shown for Home and New Tab pages for some users. (Bug 1963537) Added a workaround for a bug in outlook.office.com/outlook.live.com where attachment filenames are incorrectly prefixed with UTF-8 when saved. (Bug 1961710) |
| Utilu Mozilla Firefox Collection 138.0 Apr 28, 2025 |
Fixed: Fixed an issue where folder shortcuts on Windows were incorrectly treated as files during file uploads, preventing selecting files within the target folder. (Bug 1958222) Fixed a crash experienced by Windows users when downloading files with Qihoo 360 Total Security Antivirus software installed. (Bug 1958112) Fixed an occasional startup crash. (Bug 1958293) |
| Utilu Mozilla Firefox Collection 137.0.1 Apr 11, 2025 |
Fixed: Fixed an issue where folder shortcuts on Windows were incorrectly treated as files during file uploads, preventing selecting files within the target folder. (Bug 1958222) Fixed a crash experienced by Windows users when downloading files with Qihoo 360 Total Security Antivirus software installed. (Bug 1958112) Fixed an occasional startup crash. (Bug 1958293) |
