Just wanted to share this find: After the 1.0 update of FireBug last month, the extension stopped working for me on Firefox 2.0.x on Ubuntu. Thanks to a quick Google search, I found that FireBug conflicts with ColorZilla. After disabling ColorZilla, FireBug now works again.

(Via the comments in: Firebug 1.0: Public Beta, Still Free, and a Lite version for other browsers.)


Update 2007-02-08: The author of ColorZilla contacted me, and while we still haven’t isolated the problem, we did find that my ColorZilla extension was at version 0.8.x, and wasn’t finding the 1.0 update. After un-installing and re-installing ColorZilla, it is now somewhat more compatible with FireBug. Both extensions load, and everything except the ColorZilla Eyedropper works.

Update: It’s broken again… And once again, disabling ColorZilla got my FireBug working again. I don’t know which extension is causing the problem, but there seems to be a conflict.