Rated 5 out of 5 stars

Excellent work, but one tiny nitpick: In English, the first letter of every word is typically capitalized in a title. Consider changing the name of your add-on from "Tab notifier" to "Tab Notifier". Beyond that, can we get Snarl/Growl for Windows support?

This review is for a previous version of the add-on (2.11.1-signed.1-signed).