Looking for a tool that will help you find and edit all the little hidden Firefox advanced configurations?  Configuration Mania is a powerful addon for both Firefox 2 and the Firefox 3 Beta 4 that does a lot for being such a little addition to the browser.  I am really impressed by this little jewel of an extension because it has just about every hidden away and forgotten about edit and modification you an make the browsing experience all in one place.

Want the super tweaker that does a bit of everything?  Configuration Mania is the extension for the job.