Rated 4 out of 5 stars

EDIT - june 2015 : does not work anymore with TB 38.0.1 : throws NS_ERROR_NOT_AVAILABLE: Component returned failure code: 0x80040111 (NS_ERROR_NOT_AVAILABLE) [nsITaskbarOverlayIconController.setOverlayIcon]

I was waiting for this badge for years !

Only one remark and a suggestion for improvement :

- among the exclusion masks, you should add virtual (search) folders : because these folders contain messages that already are in other folders

- the new badge design in version 1.1 is really great, but do you think it would be possible to import a custom picture ?

Thanks for your work.

This review is for a previous version of the add-on (1.1).