Rated 5 out of 5 stars

by phattio on Oct. 17, 2018 ·

excellent add-on! needs updating for new beta version of thunderbird

by jmozmoz (Developer) on Oct. 17, 2018 ·

Unfortunately, there is no beta channel anymore here on ATN. But you can download and install a new beta version of the addon (2.2.0beta2 or newer) from http://compactheader.mozdev.org/installation.html