Firefox's about: commands (and easter eggs!)

Firefox (and other browsers) have a special URI scheme to display internal pages, or built-in functions. These commands start with an "about:" followed something, for example - "about:blank" displays a blank page.

These commands can be quite handy sometimes. For example, yesterday, I was searching for how to use the "sync tabs" feature of  Firefox 4 and 5. I knew how to enable tabs sync, but I did not know where I could access the synced tabs. Of course, if I had just gone through the menu, I would have found it under "History > Tabs from Other Computers". But, Firefox 4 and 5 have their menu bars hidden by default, and so I searched online and came upon another way to do that: just type "about:sync-tabs" in the address bar (without quotes), and there are your tabs.

So, I decided to find a list of all about: commands which can be used in Firefox. And I found some easter eggs among them. Here are the commands that I found to be working on my version of Firefox:

Easter Eggs:

• about:mozilla
  Shows a verse from the fictional Book of Mozilla.

about:mozilla

• about:robots
  Try it in your own browser, or see the screenshot below.

about:robots

General Information Pages:

• about:
  Shows information about Firefox.
• about:blank
  Shows a blank page
• about:home
  Shows the Firefox home page with a Google search bar.
• about:addons
  Shows the addons page
• about:sync-tabs
  Shows tabs synced from other computers (tab syncing has to be enabled).
• about:sync-logs
  Shows the sync logs
• about:credits
  Shows credits
• about:license
  Shows the Mozilla Public License.
• about:rights
  Shows licensing information and your rights.
• about:logo
  Shows the logo used on the about: screen.

Advanced Information Pages:

• about:plugins
  Shows installed, currently enabled plug-ins.
• about:buildconfig
  Shows the arguments and options used to compile the Firefox build in use.
• about:cache
  Shows information about the data in the browser cache.
• about:cache?device=disk
  Shows the disk cache device info, keys, and data.
• about:cache?device=memory
  Shows the memory cache device info, keys, and data.
  
• about:crashes
  Shows details of crashes submitted by Mozilla's crash reporter.
• about:memory
  Shows memory usage.
• about:config
  Shows the firefox configuration page with a lot of configuration options.
• about:support
  Shows troubleshooting information.

Other Pages:

• about:privatebrowsing
  Can be used to switch to private browsing mode. 
• about:sessionrestore
  Shows an interface for viewing about last session.
• about:blocked
  Shows the malware protection page used when the browser identifies a page as not safe for viewing.
•  about:certerror
  Shows the error page used when an SSL/TLS certificate is untrusted or otherwise invalid.
• about:feeds
  Shows the page used when clicking the rss feed icon in the address bar.
• about:neterror
  Shows the error page used when the browser could not access the requested path.

Update : Check my new post for some more "about" commands.

If I missed something, you can let me know in the comments.

Also check :

• Some more Firefox about: commands
• Start Firefox in Safe Mode by holding down the Shift Key
• 20+ Google Chrome's about: and chrome:// commands
• View any Web Page in 3D with Firefox 11