New Firefox 147 Is Now Available For Download

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Mozilla has released Mozilla Firefox 147, making the update available ahead of its official announcement scheduled for January 13, 2026. The release focuses on display rendering fixes on Linux, media playback behavior, and a collection of platform-specific improvements that affect performance, privacy, and compatibility.



Linux users running GNOME with Mutter will notice one of the most visible changes. Firefox 147 now matches its window and rendering surface sizes to the actual pixel grid used by the compositor. On fractionally scaled displays, this removes the slight blur that could appear at scaling values such as 125% or 150%. The improvement applies regardless of window size and does not require manual configuration.

Another Linux-related change is support for the Freedesktop.org XDG Base Directory Specification. Firefox now follows standard directory locations more closely, which affects where certain data and configuration files are stored. Users with custom scripts or backups tied to specific paths may want to double-check them after updating.

Media playback receives attention in this release as well. Firefox 147 enables zero-copy hardware-decoded video on AMD GPUs. By reducing unnecessary memory transfers during playback, the browser can lower CPU usage and improve performance, especially when streaming high-resolution video.

Firefox’s phishing and malware protection has also been updated. The browser now supports the Safe Browsing V5 protocol, replacing older versions used to retrieve and process threat data. The change happens in the background and does not alter user-facing controls, but it modernizes how Firefox handles malicious site detection.

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