Great color and the designer is very kind.

Hello! Could you make another topic? Like this one, only swap colors. Black main menu and active tab with a blue bar, and gray inactive tabs?
I tried, but I have a white bar on the active tab.
I saw your code on github, I would correct it, but I do not know what to do with it further.
Here is my attempt to implement what I described, only a strip of white, not blue.
https://addons.vaultpit.io/en/firefox/addon/black-theme-amoled/

Excellent theme, certainly one of the best.
It would be perfect if the contextual menus (right click) were also dark.