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CloseReview for Thunderbird Biff by rihad
Rated 5 out of 5 stars
Doesn't do anything under Kubuntu 10.04 / Thunderbird 3.0.4: the impractical built-in tray popup is still displayed when new mail arrives.
This review is for a previous version of the add-on (2.1.9).To create your own collections, you must have a Mozilla Add-ons account.