Let's say I installed a program, called "E" . Said program requests to install a Firefox add-on. Now the add-on doesn't work due to being incompatible. Because it came with E i uninstall E planning to re-install it with out the add-on, but after the E uninstall finishes the add-on is still there in Firefox, disabled and with the buttons grayed out. Moreover, Firefox displays the "Restart Firefox to uninstall this add-on" message but no matter how many times it's restarted the loop wont end. Is there any way to uninstall E's add-on?