I have been using this for years on Firefox and on Chrome and it works very well. It makes things not hurt eyes.

Excellent job of darkening. 4 stars only because: I can not (afaik) darken, for example WWW.google.com but NOT DARKEN WWW.google.com/maps. I want most sites normal so I use the INVERT LIST ONLY. Abilitiy to add subsites would help.
Revision: downgraded to 3 stars. Impossible to find documentation for the 2 short-cut keys, Alt/shift/A and Alt/shift/d.

Отлично работает.

I like this extension, one issue im having is It's kind of annoying how it automatically dark's every page. It would be nice to have all pages "Normal" until I toggle to dark. Maybe have a toggle to set pages automatically or to manual "Dark". Just a suggestion. I'd give this 5 stars if it wasn't for the auto dark thing..it keeps turning some pages to green or an off pink color its why im annoyed, it is a good extension though. If you don't mind constantly fixing pages..

Works fairly well, still needs some fixes, as sometimes the words don't change and gets hidden within the screen

i installed it and my 99 million tabs that were opened went dark instantly, thank you letting my melting eye balls rest.

New: BEST addon until W3C FINALLY adopts my draft at github... (github.com/WICG/proposals/issues/125)
Old: Addon setting "browserdesign" should be set to "default" by default, not "customized", because on customized it destroys all webExtension themes......

This extensions helped me a lot. I am very happy for finally getting this add-on, I had been finding this for a long time. Thanks! Alexander Shutau for this !