Te dodatek nie działa. Nie ma jak przełączyć na jasny i ciemny.

Useless. Don't install. More luck installing stylish and picking a good dark Youtube style from userstyles.org, where at least they're being updated.

Schrott, wie derzeit die meisten Addons für den neuen FF.
Ständig muß man zwischen den Styles hin und her switchen, um möglichst viele Buttons zu sehen,
alle zugleich sieht man trotzdem nie.

Scrap, as currently most of the addons for the new FF.
You always have to switch between the styles to see as many buttons as possible,
all at the same time you never see.