Rated 5 out of 5 stars

Από τον/την Vuktars στις Αύγ. 29, 2015 · μόνιμος σύνδεσμος

I like it. It works fine with Thunderbird 38.2.0 on Win 10.
I can install it on Firefox 40.0.3 as well, but it has no effect there actually.