Rated 1 out of 5 stars

If I have received a lot of email messages while my computer was asleep, when I wake it, this extension *FILLS MY SCREEN* with Growl notifications about the email. There should be a user-definable threshold above which the extension will simply say "You've received 42 new mail messages."

Also, the older extension "Growl New Message Notification" ( https://addons.mozilla.org/en-US/thunderbird/addon/3448 ) looks better because it also lets the user choose the format of the Growl notification.