Friday, August 19, 2011

Some more firefox about: commands

So, after my last post on this topic, some friends pointed out a couple of more useful commands. I thought I should share it here.

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. Here's a screenshot:
Firefox about:permssions
This is the meta about page - the about page of about pages. It lists all the about page available to you (except, of course, the Easter eggs). Another screenshot:
Firefox about:about
Mozilla has added this new command in the latest nightly build of Firefox 13. This page shows a list of all running JS compartments. Compartments are little segments of memory which is used by JavaScripts in Mozilla Firefox. Check this link to know more.

Firefox about:compartments

Firefox 21 has added a new "health report" page that provide a graphical representation of your browser's performance, along with average startup times, monthly running time for the application (in minutes), monthly number of crashes, and total number of bookmarks, add-ons and plug-ins.

Firefox about:healthreport

Opens a page that shows the information about performance, hardware, usage and customizations collected by Firefox's telemetry. This information can optionally be submitted to Mozilla to help improve Firefox.

Thanks for Sagar and Agni for their inputs. And, as always, if you come across any more interesting stuff about Firefox, please let me know.

Also check :


  1. yet there's one quite exciting one-

    Opens gives you sort of subtabs, but that doesn't work that way!


Your feedback is always appreciated. We will try to reply to your queries as soon as time allows.