Rated 2 out of 5 stars

This really needs to work when using alternative ways of closing Thunderbird, i.e. double-clicking Thunderbird icon in upper left, right-clicking Taskbar button and choosing Close and Alt+F4. Personally, the only way I never use to close windows is clicking the X and I know I am not alone. Hopefully, this functionality is not too hard to add (I imagine it wouldn't be). Thanks for reviving this useful plugin!

This review is for a previous version of the add-on (0.5).