Rated 5 out of 5 stars

Splendid little add-on, rsjtdrjgfuzkfg, but would it be possible for you to add that little feature to MoC, right-mouse-click on the icon in the tray to close Thunderbird?

This review is for a previous version of the add-on (2.0.1.1). 

Assuming you mean the built-in icon available on Windows only: No. That icon and its menu cannot be modified by add-ons, it exists purely in native code. You might be able use a separate application to minimize Thunderbird to the tray instead (instead of using the built-in feature).

Rated 5 out of 5 stars

Great add-on. It would be perfect if I could close Thunderbird with a right-mouse click on the icon in the tray.

This review is for a previous version of the add-on (2.0.1.1).