I found this on HowToGeek Link to the article. It is to show web pages in Dark Mode, in Chrome, FireFox, Brave, and Safari. It works for me and my Cataracts. I’ve had one eye fixed and it is very light sensitive, and dark mode relieves the pain in that eye. It is also easier on the eye that has not been fixed yet. It is adjustable with brightness and contrast settings.
I hope Jeff Jarvis doesn’t find out about this, he may have me banned,