GMail notifier extension for Firefox

I don't use GMail much because the standalone notifier is crap. While I was getting the Whiz RSS extension for Firefox last night I found the GMail notifier too.

Once you set it up, it pops an icon on the far right hand side of the status bar in Firefox. It tells you how many unread mails you have and a single click will load GMail, even logging in for you. Through the options you can even choose to load GMail into a new tab instead of navigating away from what you're doing..