Comment 148 for bug 10910

Add the prefs lines from #143 to the file /etc/firefox/syspref.js instead of seperate files. I tested this on a Ubuntu 12.04 with firefox 13 and it works as defaults for user-settings that you create after that change. It does not override user-settings that exists already! In this case you can change these settings with #147. In #143 i am referring to thunderbird. I hope this is not confusing, but this works equivalently for firefox if you user /etc/firefox/pref instead of /etc/thunderbird/pref. In theory you could also use /usr/lib/firefox/defaults/pref for the settings but anything you change here will be gone with the next firefox update.