Firefox secrets : Lifehacker This is a very good article talking about doing things with Firefox that I never knew…
By typing about:config in the address bar, Firefox gives you access to loads of editable settings and Livingston’s got tips on what new values can do (like making all frames resizable and fixing a known Windows memory leak.) A few other config areas which give more information about the browser include about:cache and about:plugins, and of course, the famous Firefox Easter egg, about:mozilla.