Hi Kyle, the best version for FF3 is Firebug 1.2
https://addons.mozilla.org/en-US/firefox/addon/1843
Firebug 1.1 works on FF2, and originally worked on FF3. But somewhere
around FF3b4 it stopped working. By that point Firebug 1.2 was well
along and we had enough on our hands to get it up on FF3.
My current thinking is that Firebug 1.2 will be complete in a few
weeks and at that point we will update 1.1 users and a week later 1.05
users. This all assumes that
getfirebug.com gets off the operating
table and out of the ICU in time....