Rated 5 out of 5 stars

Somehow it seems to be in conflict with Thunderbird Conversations Add-on. If TB Conversions was installed first, then PopUps do not show up and Alt+Q is not working. If deactivated and activated again, then PopUps do not show up automatically, but Alt+Q works. With TB Conversations deactivated everything works as expected... Thanks!

This review is for a previous version of the add-on (0.6.3). 

Hello!

There is some issue with the Conversations add-on. It does something that breaks TB message API. Besides, it removes extension button from message panel.