Firefox Configuration Mania is a Firefox add-on that displays many configuration options in a menu that looks similar to the default Firefox configuration menu. The functionality however is different and can best be described as advanced. When you open the Configuration Mania menu you see five tabs at the top, those are: Browser, Security, HTTP Network, UI and Debug. Each of these tabs opens a huge list of options that sometimes expand as well which means that it could take a while to take a look at each option.
The browser menu for instance leads to options for High Speed Browsing, Tab Browsing and Location Bar while the Security menu deals with Javascript, Redirections and Cookies. You might remember the Javascript add-on Better Javascript Control that I wrote about a few days ago. Most of the options are also available in Configuration Mania.
Many settings require some research on the Internet unless you really Internet and Network stuff in and out. The add-on explains several settings but some are not explained at all which means that beginners will have a hard time at least at the beginning.
I can only say that this is an excellent add-on for Firefox that makes it easy to change many settings that are hard to change otherwise.