Firefox’s about: commands
You would have observed Firefox displaying about:blank in the address bar of the browser. These are called the URI‘s. They are special commands which performs some operation. Example : “about:blank” displays a blank page.
These about: commands provide general information about Firefox
Shows information about Firefox.
Shows a blank page
Shows the Firefox home page with a Google search bar.
Shows the addons page
Shows tabs synced from other computers (tab syncing has to be enabled).
Shows the sync logs
Shows the Mozilla Public License.
Shows licensing information and your rights.
Shows the logo used on the about: screen.
The following about: commands provide information regarding memory, caches, plugins, configs and settings etc.,
Shows installed, currently enabled plug-ins.
Shows the arguments and options used to compile the Firefox build in use.
Shows information about the data in the browser cache.
Shows the disk cache device info, keys, and data.
Shows the memory cache device info, keys, and data.
Shows details of crashes submitted by Mozilla’s crash reporter.
Shows memory usage.
Shows the firefox configuration page with a lot of configuration options.
Shows troubleshooting information.
The Following about: commands provide information about private browsing options, sessions etc.,
Can be used to switch to private browsing mode.
Shows an interface for viewing about last session.
Shows the malware protection page used when the browser identifies a page as not safe for viewing.
Shows the error page used when an SSL/TLS certificate is untrusted or otherwise invalid.
Shows the page used when clicking the rss feed icon in the address bar.
Shows the error page used when the browser could not access the requested path.
New about: commands (added in the recent versions of Firefox)-
This command shows the permissions given by you to different websites, like allowing to store passwords, share your location, allow cookies, open pop-up windows, and maintain offline storage. This was added recently in Firefox 6, so it might not work for you if you are using an older version.
This is the meta about page – the about page of about pages. It lists all the about page available to you.