Rated 4 out of 5 stars

Was very handy (5*) for developers until 1.0 when the uninstall, disable, and enable were removed. I have patched it to add install again and hope to add enable/disable back also. Hopefully the developer will accept the patches. See http://forums.mozillazine.org/viewtopic.php?f=48&t=1780295&p=11755691&hilit=patch#p11755691