Exceptionally useful and very well made indeed. I see some reviewers say it slows down Firefox but I haven't noticed any decrease in performance.

Worked great, much better than all the other extensions. I just deleted it because I found out the website I was mainly using for supported dark mode :P

Parfaitissime !
Enfin la possibilité de choisir un affichage ENTRE le mode clair et le mode sombre. Personnellement aucun des 2 ne me convenait. Le mode clair (par défaut) défonce les yeux, et le mode sombre est beaucoup moins lisible. Avoir la possibilité de régler le contraste, le filtre sépia, les niveaux de gris, etc permet vraiment d'avoir un affichage personnalisé qui nous convient.
Quand on passe sa journée sur des écrans ça fait un bien fou ! Merci de sauver mes yeux :)

This add-on is a blessing for us people of the night.

Automatically change websites to dark themes based on your system settings, your real location or by setting a time frame yourself.
It works very well but in case you're seeing incorrect or annoying colors you can customize the theme for general purposes or for a specific website.

Very reliable.