Editing textareas in opera/firefox with external editor

[Paulo Marcel Coelho Aragao <marcelpaulo+l@gmail.com>]

Would anybody know if Opera or Firefox have something equivalent to the mozex 
extension for Mozilla ? I used mozex heavily for editing textareas with vim 
and spawning mutt to handle mailto links. I'm trying to switch from Mozilla to 
Opera or Firefox but have just realized that mozex is just too essential to go 
without.

Thanks for your attention,
Paulo