Rated 4 out of 5 stars

Hi!
Using it with Thunderbird 31.8 under Kubuntu 15.04 (KDE Plasma 5). Love it!

Only, to reopen the minimized Thunderbird, I have to right-click and select "Show/Hide". Would love if a simple click or double-click on the logo maximizes....
(Under another comment is a middle-click mentioned, this doesn't work for me)

This review is for a previous version of the add-on (0.5.6.1-signed).