Mozilla Firefox has a variety of configuration settings and diagnostic information available in its internal about: pages.
You can access each page by typing about: into the address bar, followed by the name of the topic.
The about: pages contain everything from the story of Mozilla’s battle against Internet Explorer and robot pop-culture references to advanced configuration
settings, permission management and diagnostic information.
The about:about page is an index of Firefox’s about pages. Click any of the links on this page to explore them.
Try out the about:ro...