About protocol links

There are a few special URLs, which begin with about:, that you can type into the Location Bar.

• about: — The same page as "Help -> About".
• about:about — Lists all these about: URLs (Mozilla Suite only).
• about:blank — A blank page. Useful for setting as your homepage.
• about:bloat — Displays BloatView output (disabled in release builds).
  • about:bloat?new
  • about:bloat?clear
• about:buildconfig — Reveals details about your Mozilla build options.
• about:cache — Displays cache statistics and disk cache directory location.
  • about:cache?device=memory — Lists memory cache entries.
  • about:cache?device=disk — Lists disk cache entries.
• about:cache-entry — Shows information about a cache entry. Used in about:cache links. Requires parameters.
• about:config — GUI for modifying user preferences (prefs.js).
• about:credits — The list of contributors to the Mozilla projects.
• about:logo — Displays the Mozilla logo (Mozilla Suite only).
• about:kitchensink — Was never included in Mozilla for the reasons listed in Bug 122411 ("Mozilla does not have a kitchen sink"). You can install an extension that adds it though :)
• about:license — shows the Mozilla Public License and the Netscape Public License for the piece of software. ( Only in products based on Gecko 1.8 )
• about:mozilla — The famous Book of Mozilla.
• about:plugins — Lists all your plugins as well as other useful information.

Extensions

Certain Firefox extensions add a few additional about: URLs.

• Firesomething adds two excerpts from The Book of Mozilla, Extended edition (about:firefox and about:firesomething).
• InfoLister adds about:info, a listing of your extensions, themes, and plugins.
• about:kitchensink extension
• MR Tech's About:About

External Links

• Place in Mozilla's code where these are listed