2 publishers · first seen Tue, 27 Oct 2026 09:35 UTC · updated Wed, 28 Oct 2026 16:05 UTC
Firefox 159 has been released for Windows, macOS, Linux, and Android, featuring a new password tool in the sidebar that is now enabled by default. The update includes over 160 security vulnerability fixes, with Mozilla listing 167 vulnerabilities resolved, 108 of which are classified as high risk. Among the fixes are 97 use-after-free vulnerabilities and 13 sandbox escape flaws. The release also introduces an AI-assisted feature for monitoring website changes, rolled out gradually to users.
For Linux users, Firefox 159 resolves a memory usage issue on systems with AMD graphics when viewing map or place results, and fixes tab rendering problems on Wayland. The browser now enables scroll-driven animations by default for web developers. Updates are also available for Firefox ESR versions 153.6.0 and 115.44.0, with 145 and 80 vulnerabilities patched respectively. Firefox 160 is scheduled for release on November 10th.
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