There are numerous websites explaining how to tweak Firefox preferences with about:config
Here is just 1 example
http://www.tweakguides.com/Firefox_10.htmlFor those who test distros, it is a hassle to tweak Firefox again and again in the new installed distro.
Here is a way to save this time by creating a file and copying it into every new Firefox installation once, restarting Firefox and there you go with all the tweaks.
Short instruction:
1.Create a text-file with leafpad or pluma or whatever file-manager you like.
Name it
user.js2. Insert the about:config settings into this user.js file.
3. Place the user.js file into the profiles folder of Firefox.
4. Start / restart Firefox. Done
Here is the complete description for this excellent method:
http://kb.mozillazine.org/User.js_file
Here is a part of my user.js file to give you an idea how easy this method is:
// Geolocation API abschalten
user_pref("geo.enabled", false);
user_pref("geo.wifi.uri", "");
user_pref("browser.search.geoip.timeout", 1);
// WebRTC deaktivieren
user_pref("media.peerconnection.enabled", false);
user_pref("loop.enabled", false);
// WebGL deaktivieren
user_pref("webgl.disable-extensions", true);
user_pref("webgl.min_capability_mode", true);
user_pref("webgl.disable-fail-if-major-performance-caveat", true);
user_pref("webgl.disabled", true);
// Clipboard Events deaktivieren
user_pref("dom.event.clipboardevents.enabled", false);