Rated 1 out of 5 stars
Make it minimize to tray please. Otherwise it's useless!This review is for a previous version of the add-on (18.104.22.168).
This add-on is not intended to move Thunderbird to the tray. Doing that from an add-on is no longer realistically possible, so that feature will never be implemented. But there are separate programs that can move any program to the tray whenever you minimize it – this add-on can be used in combination with those programs to get Thunderbird into the tray when closing the window as well.