It's currently not being updated and still with bugs for something that should be simple. the github page has more than 30 issues open for many months now.

Automation based on the system theme doesn't work (FF 149 Windows). I don't understand how this can be "recommended"

Firefox 149 on macOS Tahoe 26.4 - Doesn't work - Tried automatic settings, tried set to system settings, tried manual setting...all the same...nice idea but 👎🏻

fg777phcc6.com/maigard21

it doesnt work

Perfect !

Zmiana po motywie systemu nie działa w ogóle, a w przypadku ustawienia konkretnych godzin działa tylko czasami. Nie wiem o co chodzi, że niedziałające rozszerzenie jest polecane przez Mozillę (Nie wspominając że ta funkcja powinna być w samym Firefoksie)

Turned dark mode on at the set time but didn't automatically turn it off.

Works perfectly! Love how it switches themes automatically by time.

the change theme based on system theme doesn't work on linux