Comment on Gmail.app

Note: As the Gmail.app page says, you need to install Mozilla's XULRunner first to get this to work.

<a href="http://ftp.mozilla.org/pub/mozilla.org/xulrunner/releases/1.8.0.4/mac/en-US/xulrunner-1.8.0.4.en-US.mac.dmg">XULRunner 1.8.0.4 from Mozilla.org</a>