Very nice indeed!
Nice one! Thumbs up. Maybe you could also create one without the 'Firefox-logo'? Your 'gradient grey' is nice, luckily not too dark. Some other themes are very dark / or black. Soft grey or soft blue are much better. A matter of taste, I know... :-)
Rated 5 out of 5 stars by Anonymous-6088968 on August 17, 2015
Another nice from Mozilla
Rated 5 out of 5 stars by michalis1985 on July 11, 2015
Thanks a lot buddy!
Rated 5 out of 5 stars by Chathuranga Udagama on November 25, 2010