Rated 5 out of 5 stars

per Bagok701 el mar. 7, 2010 · enllaç permanent

Works in 3.6 some visual bugs (changes addon download background)
For those of you who don't care to login to get the Leet Key 1.4.3 or other versions go here https://addons.mozilla.org/en-US/firefox/addons/versions/770