Works almost fine Rated 2 out of 5 stars

When you have checked default sound option in configuration of Thunderbird, you add as many sound you like and you can go eating, reading or even playing, so you get noticed.

The problem is, I hear default software beep as default and the long music for some filter is cutting down to minumum ...

This review is for a previous version of the add-on (0.1.20081211).