Yeah this is a great extension - I installed it earlier The only stupid thing is your cursor is after the inserted code as opposed to in the middle of it. And yes it could be easily done with favelets
That Active X Crap is the main reason for the vulnerabilities....
I'd wish they wouldn't install that by Default, but hey...
But actually, i hope Mozilla will fix those parts, where their browsers don't interprete valid code correctly. Not that there are that much problems, but they are there, and i came across some of them (and lost a lot of hair, while trying to fixing what was unfixable ^^)