NOW PERFECT! THE BUG WAS FIXED, thx Manuel!! I confirm the recent "Bug"! I cannot change the visited link color...I change the color but the change does not show up on the web page after page reload. Should be something simple? Thank you Manuel Reimer for your fine work.

das geilste was es gibt wenn mann meist Nachts unterwegs ist, sich aber Sachen anzeigen lassen muss über den Browser, ständig ist man geblendet, mit der Erweiterung ist das Geschichte, in die Adresszeile gelegt - ein Klick und die Seite ist dunkler Hintergrund und weisse Schrift, da kann man nur danke sagen an den Entwickler

It's simple and it works. Having this add-on saved me the time of updating my old toggle doc colors add-on to work with Web Extensions, so thank you!

Works as advertised. 4 Stars for being effective and simple.

Would be nice if you have a black-list of domains it works on automatically though, so not 5 stars ;)

It's a useful extension for Firefox Quantum. The ability to put the On/Off toggle in the address bar gives me the ability to reduce eyestrain by SHUTTING DOWN all those BLINDING WHITE websites!!!! I can reset every page at need to a soothing Lite Grey Background.

Why do all Programmers and Web Developers think everyone is from Krypton or something?!?!? Everything is Great...until your head starts SPLITTING!

Kudos, Manuel!