there is no way to save website exceptions when reinstalling! i had to reinstall firefox and all of my website exceptions are gone, over 50 sites! 1 star, include a way to export sites...

Excellent. Long-time user. Unconditionally recommended.
Do not mistake with another new extension which has the nerve or the blindness to have the exact same name : Dark Reader at https://addons.mozilla.org/en-US/firefox/addon/dark-reader-player/

Must have in the World of "White Madness" we currently live in.

This addon is a test of frustration. Half the time it doesn't work properly. Either it sets dark theme during the day or fails to set it after sunset. I tried letting it follow the device theme and the location coordinates, and in both cases the problem persists. I don't understand why I constantly find myself manually disabling/enabling the dark theme. It used to be way better.

Veramente gratuito, riservato e prioritario

excellent!! changes all to dark bgnds and white text. <3