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Where are the about:config settings for a profile stored?

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  • 51 have this problem
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  • Last reply by MxyL

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I am setting up a custom firefox profile and would like to tweak some of the options that are accessed via about:config.

I would like to know where this information is stored and whether I am able to modify these options outside of the browser.

Chosen solution

They're stored in the prefs.js file, which is a plain text file.

Preferences can also be set at startup using the user.js file. This file doesn't exist by default.

Preferences can also be locked with the mozilla.cfg file in the installation folder. This file doesn't exist by default.

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Chosen Solution

They're stored in the prefs.js file, which is a plain text file.

Preferences can also be set at startup using the user.js file. This file doesn't exist by default.

Preferences can also be locked with the mozilla.cfg file in the installation folder. This file doesn't exist by default.

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Thanks, I was modifying the prefs.js file the whole time but didn't realize these were the same settings from about:config. The user.js file is also useful to know.

Modified by MxyL