As far as I know, regular Firefox does not include support for group policy. You can specify preferences in a file named mozilla.cfg, but this is not a registry-based solution. * http://kb.mozillazine.org/Locking_preferences * https://developer.mozilla.org/en-US/docs/Automatic_Mozilla_Configurator/Locked_config_settings Are you considering deploying the "ESR" version of Firefox? More info: * http://www.mozilla.org/en-US/firefox/organizations/ FrontMotion distributes a custom build of Firefox that supports ADM. I haven't tried it myself: * http://www.frontmotion.com/FMFirefoxCE/index.htm