Firefox 131 for developers

This article provides information about the changes in Firefox 131 that affect developers. Firefox 131 is the current Nightly version of Firefox and ships on October 1, 2024.

These features are newly shipped in Firefox 131 but are disabled by default. To experiment with them, search for the appropriate preference on the about:config page and set it to true. You can find more such features on the Experimental features page.