very well! for me the best Rated 5 out of 5 stars

Ein hervorragendes Themes! Ich bin echt begeistert und nutze es schon lange. Dafür gebe ich gern eine echte Empfehlung. Wäre echt toll wenn es dieses Themes auch für Thunderbird geben würde.

An excellent themes! I am really inspired and use it for a long time. For it I give with pleasure a real recommendation. Would be really great if it this themes also for Thunderbird would give.

This review is for a previous version of the add-on (1.4.8). 

Thanks.
Firefox support takes a lot of my time because there are changes every month.
For Thunderbird support, you must wait. Perhaps in the future....