Maximize Firefox Without Extensions Using About:Config. If you type about:config in your address bar, Firefox opens the master directory of user-defined preferences and built-in settings.
The ultimate arena for performance tampering, the about:config settings are the foundation for programming Firefox extensions. We’ll show some simple about:config modifications below. Download Flash and Video. Best guide to add-ons, themes and tips for Firefox. Mozilla Firefox Cheat Sheet. Add-ons for Firefox.