This extension is amazing. It doesn't always work 100%, but it's very consistent. It allows for a ton of customization with regards to contrast levels on different websites and throughout the whole web. Not only can you control differing levels on separate sites, you can also exclude websites, which is helpful when things start to bug out. I have been using this extension for over a year now and I love it.

Einfach eine sehr gelungene Erweiterung! Es benutzt in about:config, die "versteckten" Einstellungen von Firefox um den "Darkmode" zu Aktivieren! Wirklich eine sehr Intuitive Oberfläche, einfach zu bedienen und die Erweiterung hat eine hervorragende Grafische Oberfläche! Auch ist sie von der Funktion ein Meisterstück! Dies ist eine "Standarderweiterung" geworden die beim Installieren von Firefox auf garkeinen Fall fehlen darf! Dies ist damit die beste "Darkmode App" die es für Firefox gibt! Ihr werdet keine bessere finden! Danke, wirklich Herzlichen Dank für diese, tolle Gelungene Erweiterung für Firefox!

This extension is the best thing to happen to Firefox since Electrolysis and Quantum. I use it on, and it works well on, nearly every Web site. For the few sites that don't jibe with default settings, it manages per-site settings for custom colors or flat out disablement very elegantly. I can't give this enough stars.
UPDATE: I decided that this is the first browser extension worthy of giving the developer a donation for. And I did that. And I suppose I couldn't resist tooting my own horn about it. *toot*

Saved my eyes for sure.

Only used for a day, but thus far it's perfect. Love the color customization, it's not in-depth but it's just enough to set it somewhere comfortable for your eyes. It's also smart enough to correct embedded white backdrops, unlike the other version I tried. Awesome!

Tuts wieder, klasse.

GREAT

Edit: Loading issues seem to have been resolved!

I'm also having issues with the latest update breaking page loading. Hoping this gets the dev's attention and will happily revise to 5 stars when resolved!