I love Firefox as well GK. I had the Gmail notifier the day it came out and I also got the extention that lets you open up your webmail automatically to a new tab when you click e-mail addresses listed on pages.
I have really enjoyed it and I look forward to the next release as it gets better each time. I even use the IRC client for it. Not as powerful as mIRC or anything, but at 200k, loads in a browser window, and being free, I like it.
FIREFOX it ROCKS!