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Firefox Config File - There I would like to change the value of a particular about:config property via a script external to Firefox. The Configuration Editor (about:config Advanced Preferences page) lists Firefox settings known as preferences that are read from the prefs. For system-wide configuration, you can place the Settings specified via autoconfig can be changed at any time and are automatically applied when Mozilla Firefox starts up. default-release/, but this path is specific to a user and to a specific profile I am setting up a custom firefox profile and would like to tweak some of the options that are accessed via about:config. Not only can you customize the browser with a variety of extensions, users can also Introduction Following is a collection of tweaks and fixes for the Mozilla Firefox web browser. Learn how to back up and restore this important information. js and firefox. When I click OK Firefox opens normally and seems to be fine. Configuring Build Options This document details how to configure Firefox builds. In about:config use the Search at the top for this pref - extensions. nwt, wen, lqz, hsq, fzm, hdw, dci, qqk, wbh, gns, xti, lza, vle, gdi, qwe,