I was looking for theme used by a youtuber Sun Knudsen. This is probably the closest one or the actual theme. Pretty good and soothing to eyes. Love it!

I tried loads of themes and this was the only one I found that was:

-Dark enough to be easy on the eyes,
-Contrasty enough to make the selected tab clear without needing ugly borders
-Distinctive enough to stand out from most sites generic dark schemes
-Generally understated but aesthetically pleasing.

In short, my new default :-)

This one makes me remind one of Winamp theme skins. Also it looks good in my desktop. I totally recommend this one. Thank you for creating this theme @afnan khan

Melhor tema. Nem preto, nem branco, os dois juntos =)

Thank you so much. It's the prettiest dark theme on Firefox!

great! love it. smooth af