This addons/extension is very good for my eyes because makes the websites dark so my eyes is not hurted anymore.

Useful add-on, thanks!
Please make it change toolbar icon color depended on current page status (Dark Reader on or off for the site).

It works. And it often makes websites look better than the official dark theme. Easy to switch off on a per-website basis when something is obscured. The UI for that isn't obvious though (you have to click the website name in the Dark Reader box).