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⇱ Firefox 147 Beta Released With XDG Base Directory Support - Phoronix


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Firefox 147 Beta Released With XDG Base Directory Support

Written by Michael Larabel in Mozilla on 9 December 2025 at 12:20 PM EST. 29 Comments
With Firefox 146 released, which is exciting for delivering fractional scaling on Wayland, Firefox 147 Beta is now available and it's also quite exciting to Linux users for another reason.

Firefox 147 Beta is exciting in finally shipping XDG Base Directory specification support for the Linux build! As covered last month, Mozilla is finally supporting the XDG Base Directory specification in Firefox. To date Firefox has just positioned all files under ~/.mozilla rather than the likes of ~/.config and ~/.local/share while moving forward Firefox will respect those common XDG Base Directory specified locations in the user's home directory. This has been a feature request for Firefox on Linux going back two decades.

👁 Firefox 147 Beta on Linux


Firefox 147 Beta also brings WebGPU support to all macOS configurations, zero-copy video hardware decoding is now enabled for AMD GPUs, support for the Safe Browsing v5 protocol, automatic Picture-in-Picture player window if a playing video is ever backgrounded, and support for IETF RFC 9842 Compression Dictionaries.

More details on the changes with Firefox 147 Beta via the release notes. Firefox 147.0 stable will be out in January.

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.