Removing Firefox in Ubuntu with all add-ons like it never existed

Delete Firefox and all it's data: I think this can be done in five easy steps, please edit my answer - or tell me to - if it's not complete: run sudo apt-get purge firefox Delete .mozilla/firefox/ in your home directory, should it still be there Delete .macromedia/ and .adobe in your home directory, these can contain "Flash Cookies" stored by the browser. The same is true, if applicable, for Silverlight (Moonlight) and other plugins, they can allow websites to store data on your computer. Delete /etc/firefox/, this is where your preferences and user-profiles are stored Delete /usr/lib/firefox/ should it still be there Delete /usr/lib/firefox-addons/ should it still be there Mind the periods in front of file- and directory names: They indicate a hidden directory. You can tell your File Browser to show them by pressing Ctrl+H. The 4th and 5th step must be done with superuser privileges. To start a the File Browser as a superuser, press Alt+F2 and enter gksu nautilus. Finally, restart your computer to get rid of all temporary files. This should remove all traces of firefox ever being there. Important: Don't rely on this method if you've got sensitive information to protect! Deleting a file, in most cases, only means deleting a reference to it. The raw data will still be on your hard drive, and the proverbial bond-villain will be able to recover them. I'm only mentioning this in case it's applicable to anybody who reads this. The only way to really get rid of data, is to shred the hard drive to bits. CREDITOS: http://askubuntu.com/questions/16758/removing-firefox-in-ubuntu-with-all-add-ons-like-it-never-existed