don't work

They want 10€ just after installation. Avoid.

best

while I enjoy dark reader, it makes websites look a lot better, but dark reader slows Firefox on Android to a crawl, I just cannot take it, and after reading an Reddit post where users were complaining about the sluggishness of Firefox on Android, a user mentioned dark reader being the culprit, so I disabled dark reader.
Problem solved, sorry, not sorry

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This add-on makes websites less painful at night.

Godsend extension, saved my eyes! Lot's of features & benefits.