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⇱ Firefox 147 Now Available With XDG Base Directory Specification Support - Phoronix


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Firefox 147 Now Available With XDG Base Directory Specification Support

Written by Michael Larabel in Mozilla on 12 January 2026 at 09:33 AM EST. 31 Comments
Firefox 147.0 release binaries have hit the Mozilla servers today as the latest monthly update to this open-source web browser. Firefox 147 is exciting for Linux users in finally delivering XDG Base Directory Specification support.

As talked about back in November, 21 years after the bug report / feature request was raised, Firefox is finally supporting the XDG Base Directory Specification. This common Linux desktop specification lays out where application data files, configuration files, cached assets, and other files and file formats should be positioned within a user's home directory and the XDG environment variables for accessing those locations. Up to now, Firefox on Linux has just always tossed its user files within ~/.mozilla.

👁 Firefox 147 on Ubuntu Linux


Firefox 147 also delivers on 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 developer additions with Firefox 147 via developer.mozilla.org.

Those relying on the upstream Mozilla binaries of Firefox can grab the freshly-built Firefox 147.0 release at Mozilla.org.

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.