Complete List Of Firefox About: Commands

Firefox makes use of special URL commands to display its internal pages for configuration and functionality. For example, about:blank command in the address bar displays a blank page and about:config displays all the Firefox configuration.

Normally we don’t use most of the functionality offered by About: commands in Firefox but some times these commands come in very handy to tweak the browser functionality according to our needs or troubleshooting the browser malfunctioning.

about robots command firefox

Here is the complete list of Firefox About: commands along with their short descriptions

Using the About: Commands in Firefox

Using the About: commands in Firefox is quite simple. You just have to enter the command in the Firefox address bar and press enter. This is like entering the URL of any webpage to open it. For example, if I want to know more about my installed version of Firefox, I will write about: in the Firefox address bar. Pressing enter will bring me the information I want.

Just for Fun

about:mozilla
Shows a verse from the book of Mozilla

about:robots
A robot greets the humans

General Information

about:
Shows information about Firefox like version, contributors, build configuration etc.

about:about
Shows the list of all the About: commands supported by that specific version of Firefox

about:blank
Shows a blank page

about:home
Shows the Firefox homepage

about:addons
Shows the addons page

about:sync-tabs
Shows tabs synced from other computers if tab synchronization is enabled

about:accounts
Shows the Sync login screen to login to Mozilla to sync browser data

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about:sync-logs
Shows the sync logs

about:credits
Shows credits

about:license
Shows the Mozilla Public License

about:rights
Shows licensing and rights information

about:logo
Shows the Firefox Logo

Advanced Information

about:plugins
Displays the plugins that are currently installed in Firefox

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:crashes
Shows details of crashes submitted by Mozilla’s crash reporter

about:memory
Shows detailed memory usage

about:support
Shows troubleshooting information

about:blocked
Shows the page which is displayed when a malware website is encountered in Firefox

Functional About Pages

about:config
Shows the Firefox configuration information. You can tweak the Firefox functionality using this config page

about:sessionrestore
Gives the option to restore the last browsing session

about:certerror
Shows the error page when the SSL/TLS page is untrusted

about:feeds
Shows the page when feeds are displayed

about:neterror
Shows the error page when the browser is not able to access the requested page

about:permissions
Shows the permissions page where you can see the permissions given by the user for each visited website including password storage information, location sharing, pop-ups allowance, offline storage etc

about:compartments
Shows a list of all running JS components. Compartments are little segments of memory which is used by JavaScripts in Firefox. This command is no longer available in the latest versions of Firefox. It has been merged in about:memory page

about:healthreport
Shows vital stats about Firefox performance

about:telemetry
Shows the information about performance, hardware, usage and customizations collected by Telemetry. This information is submitted to Mozilla to help improve Mozilla Firefox. Telemetry is disabled by default. You can enable it from this page

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Which About: command do you use the most? Did I miss any command? Please share your thoughts by clicking here.