I'll keep it to three stars for now. The blacks are actually black and not a dark grey like other similar extensions I've used. The only thing here is that I have to get into the extensions options menu and enable / disable it from that menu.

The only way I'd give this five stars is if it was like a switch that could be enabled right from the toolbar. "Dark Mode (WebExtension)" by Bernard pulled this off to a T, but I'm not exactly a fan of the color scheme although I'll stick with it simply because it's one less step I have to make, and believe me, I click that button a lot.

I'll keep an eye on this one though.