I have Dark Reader. I think it wasn't working properly for me. Right now the site is 404, can't check.

But I agree with other commentors, Dark Reader isn't the solution. There is not really an excuse for not doing a builtin darkmode nowadays, imo.

As some who loves dark mode, I hate that extension. I get the appeal of forcing every website to be dark mode, but that ends up breaking half of them or just making them look like trash. People need to custom design their dark modes for whatever each design is.

If you don't care about breaking design and stuff looking the way its supposed to, I guess the extension is fine but I rather use something like Stylus where you can use people's custom designed stylesheets for most known sites.