Review for Mailbox Alert by Moi
Rated 3 out of 5 stars
That's good but on my system it does not work when thunderbird is minimised. I don't know if it is a bug or a feature, but it makes this add-on less useful. If it worked when minimised also, it would get five stars.
This review is for a previous version of the add-on (0.16.4).To create your own collections, you must have a Mozilla Add-ons account.