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⇱ Firefox 147 Will Support The XDG Base Directory Specification - Phoronix


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Firefox 147 Will Support The XDG Base Directory Specification

Written by Michael Larabel in Mozilla on 20 November 2025 at 08:19 AM EST. 51 Comments
A 21 year old bug report requesting support of the XDG Base Directory specification is finally being addressed by Firefox. The Firefox 147 release should respect this XDG specification around where files should be positioned within Linux users' home directory.

The XDG Base Directory 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. To date Firefox has just positioned all files under ~/.mozilla rather than the likes of ~/.config and ~/.local/share.

👁 Firefox XDG Base Directory spec bug report


Back in September 2004 this bug report was opened to support the FreeDesktop.org XDG Base Directory specification.

Merged this morning was the support for this specification and associated commits.

👁 Firefox XDG Base Directory spec commit


In turn this long-open bug is now closed and Firefox 147 should be the version to finally support the XDG Base Directory specification for jiving more nicely with other Linux apps.

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.