| Version | Change log |
| 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 |
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