Firefox about: pages

Special pages available in firefox :

• about: A simple prompt without any parameter will display the Mozilla “about” information.
• about:logo Displays firefox logo.
• about:licence Informaion regarding licencing, Mozilla Public licence, Source code licence
• about:buildconfig It shows the build platform configuration and parameters.
• about:blank — A blank page. Useful for setting as your homepage.
• about:cache Displays info and statistics regarding memory cache device and disk cache device including the number of enteries, name of your cache’s directory and a list of the entries you can find there. From there ou can view cached webpages and images.
• about:config It provied you an nice interface to tweak firefox settings. It allows you to modify firefox preferences. Read About:config entries to more about it. These entries are stored in pref.js folder in your profile.
• about:plugins provides information regarding installed plugins (plugins help your browser perform specific functions like viewing special graphic formats or playing multimedia files.) like flash, quicktime, realplayer, adobe reader and java plugin
• about:credits This is an alphabetically sorted list of all the people that gave their contribution to the development of Firefox.
• about:Mozilla from Book of Mozilla, 7:15

来源：http://www.aburad.com/blog/2007/01/firefox-about-pages.html