Firefox Tweak Guide
Mozilla Firefox, or simply Firefox for short, is just a free Internet browser. It's not a cure for cancer. It doesn't wash your car or make you a frothy coffee. So why all the fuss and hype over Firefox? In a nutshell, the reason is simple: Firefox is a true open source competitor to Microsoft's Internet Explorer.
Whether you're a first-time user or a veteran, this Firefox Tweak Guide brings together all the major tips, tricks and tweaks for Firefox. From the basic to the advanced, the following 11 pages of information are sure to enhance your Firefox experience. Most of all you can rest assured that the guide is not written by a raving Firefox fanboy - it's a true objective TweakGuides tweak guide, and not a gushing ad for a free web browser.
Full Article. Primarily aimed at the windows version, many/most options discussed applies to linux versions as well.