TECHNOMALISTMozilla has shipped Firefox 154 for Windows, macOS, Linux, and Android. The update adds several usability improvements, including Nvidia GeForce Now streaming on Windows, faster video skipping, and new optional app icons, while also fixing 58 security vulnerabilities.
On Windows only, Firefox 154 can now stream games through Nvidia GeForce Now. The article notes that this feature can help users avoid spending money on expensive local gaming hardware. Windows users can also choose a different Firefox app icon for the first time. This option was already available on Android and iOS. The icon choices include the original design from 2004, the 2017 icon, a rainbow-themed Pride icon, and other bonus icons. Mozilla says macOS and Linux will get the icon customization later.
Across all supported platforms, skipping to a different point in a video should be faster. Firefox has also changed how it translates web pages. Previously it relied on language information provided by the site itself. Now Firefox performs its own language detection. As a result, content inside iframes can be translated as well. Another privacy-related change: if a site is on the exception list for deleting cookies and website data, it is no longer automatically excluded from tracking protection.
The free built-in VPN that debuted in Firefox 149 continues to offer unlimited data and a list of virtual locations. That list has been temporarily expanded to 28 countries until the end of August. The VPN is currently available to Firefox users in the United States, Canada, the United Kingdom, France, and Germany. Mozilla is now gradually rolling out the free VPN to Firefox for Android, with iOS support expected soon.
The Mozilla security advisory for Firefox 154 lists 58 resolved vulnerabilities. Of those, 54 were found and reported by outside security researchers. Mozilla classifies 17 of the flaws as high severity, 30 as medium severity, and the remaining 11 as low severity. The final four entries in the advisory, labeled CVE-2026-74987 through CVE-2026-74990, summarize an unspecified number of internally discovered security issues. Most of those are rated high risk and stem from programming errors in memory management. The advisory groups these internal bugs according to which software versions are affected.
Alongside Firefox 154.0, Mozilla released updated extended support versions: Firefox ESR 153.1.0, 140.14.0, and 115.39.0. The 115.39.0 ESR is limited to Windows 7, Windows 8.1, and macOS 10.12 through 10.14. The ESR updates include fixes for the above vulnerabilities that exist in those older browser code bases. According to the source, Firefox ESR 153.1.0 receives more than 52 security fixes, ESR 140.14.0 at least 31, and ESR 115.39.0 at least 13. Firefox ESR 140 will be replaced by Firefox ESR 153 in October.
Mozilla has scheduled Firefox 155 for September 1. That release will see Mozilla adopt a fortnightly major release cycle, similar to Google Chrome and Microsoft Edge.
This article is based on reporting from PC-WELT that was translated and localized by PCWorld.
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