On pc Mozilla browser it instantly started to work! Not yet sure about how I like all the colors and that, but I give 5 for that it instantly starts to work.

no bugs,working perfect with zen browser

I use a custom Firefox theme which is great - but it doesn't work well with Windows system dark mode. With this extension, you can define a Firefox theme to be used when Windows system dark mode is enabled / disabled.

Very good. I only miss a direct way to change the extension settings, for instance, clicking on its extension's icon.

.....

Очень классное расширение

schon

Funciona como esperado e dá para escolher entre qualquer tema já instalado no FF para ambos os modos. Ótimo!