The Growl project’s Mozilla extension has officially been released! I dropped Chatzilla support for now since that was the only thing that was holding it up for a stable release. Chatzilla support will come back, but there’s a few bugs I still need to work out. I didn’t see a reason from keeping the other functionality this extension brings from the masses otherwise.
I’ll get on writing docs on how to add your own notifications for Growl on the mac as well. I’ll post here when those are done (hopefully tonight). UPDATE: Developer docs can be found here.
Anywho, you can get it for Thunderbird, Firefox, and Flock right here