In our articles we often mention his mandate Firefox about: config, which is given by the address bar. This command opens Firefox's built-in configuration program and allows you to configure the browser. 
It contains many options that are not accessible from the browser menu. Many Firefox users do not even know that the about: config command is not the only about about: command in the browser.
Firefox comes with a huge list of useful commands that we will share today with you.
Each about: command is given in the address bar, such as a common webpage URL.
Firefox allows you to extend the about: commands that it contains using special extensions, but the main add-ons list with the about: instructions is as follows (You should see this Firefox article for you to use the following links):
- about: the same page as "Help -> About Firefox" (except that Help → About Firefox is a much smaller pop-up).
- about: about Displays a list of all these about: URLs pages for you to have.
- about: accounts Displays the page with the Firefox Sync account.
- about: addons The page with the administration of addons.
- about: app-manager a tool that helps users create and install Web Apps on compatible devices (eg Firefox OS).
- about: buildconfig A page that gives you details about the options of the Mozilla version.
- about: cache Displays cache statistics and the cache location on the disk.
- about: cache? storage = memory Lists with cache entries.
- about: cache? storage = disk Lists with hidden file entries in the disk.
- about: cache-entry Displays information about a cache entry. Used in about: cache links. Requires parameters.
- about: compartments Display a list of live JavaScript compartments. Now there is but he does not work.
- about: config Graphical User Interface (GUI) to modify user preferences. Before you sign in, it shows a warning page for any changes you may make.
- about: crashes List of crash reports with links and dates.
- about: customizing Starts the Customize feature.
- about: credits The list of all participants for creating Firefox.
- about: downloads Your recent downloads.
- about: home The homepage of Firefox.
- about: healthreport Firefox Health Review. Also accessible via the "Help -> Firefox Health Report".
- about: license (There is no about: license) Shows the Mozilla Public License and the Netscape Public License for the piece of software.
- about: logo It shows its logo applications.
about: memory ΔFirefox memory usage. - about: mozilla Presents the Mozilla book
- about: networking Displays the experiment page about the Firefox network connections available at any given time.
- about: newtab Displays the default new tab page.
- about: permissions Displays and manages permissions for all web pages. The same goes for each webpage separately from Tools -> Page Info -> Permissions.
- about: plugins Displays all your plugins as well as other useful information.
- about: preferences Open preferences.
- about: privatebrowsing Opens a new private browsing window.
- about: rights Displays the "Information about your rights" page.
- about: robots Mozilla's hidden joke page. The Easter Egg (Easter egg) as foreigners also say.
- about: sessionrestore Opens the "Reset last browsing session" page.
- about: support Displays Troubleshooting information. Also accessible via "Help -> Troubleshooting Information".
- about: sync-log Displays synchronization logs.
- about: sync-progress Shows the progress of sync.
- about: telemetry This page displays information about performance, hardware, usage, and adjustments collected by telemetry. This information is submitted to Mozilla to help improve Mozilla Firefox.
- about: webrtc will be implemented in the near future.
- about: welcomeback The "Firefox is ready to reset" page.
This list can be changed by Mozilla with a new version of Firefox. You can always check the list of about: commands available in your browser by entering the following in the address bar:
about: about
Also note the following about: URLs which do not appear in the official about: about list but still exist:
- about: blank A blank page. Useful to set as your homepage.
- about: blocked Used by the Safe Browsing tool to display a warning about a risky website.
- about: bloat Shows the BloatView output to Beta / Nightly versions. BloatView is a tool that displays information about cumulative memory usage and leaks. It does not work on regular versions of Firefox.
- about: certerror Displays "The current link to the page is not trusted" if a web page has an invalid certificate.
about: feeds Displays the "feed file" page. - about: newaddon A dialog appears when one or more add-ons have been added "without" using the normal Add-on procedures. It asks you which ones you want to keep enabled. If you have not added an add-on in an irregular manner then if you type about: newaddon in the address bar, nothing will be displayed.
- about: neterror Displays the error page.
- about: socialerror will be implemented in the near future.
- about: tabcrashed will be implemented in the near future.
Bookmark this page for the future to access the complete list of about: Firefox commands.
