Rated 5 out of 5 stars

Works seamlessly on Linux! I mean, real Linux. Tested in Arch, Debian and OpenSuse without problems. If the DE breaks firetray, blame it on the DE! It shows the notifications and works as intented. Love the option for select custom icons. First thing I add after setting up Thunderbird. Many thanks!

This review is for a previous version of the add-on (0.4.8.1-signed).