I added this extension today, and from what I can see so far, it's by far the best dark mode add-on available. In addition to the exceptionally well-coded CSS replacement, one thing that makes it better than all others is the ability to have it OFF by default and then add just the sites you wish. This fits my style perfectly, as I already make use of a site's native dark mode wherever possible. (You can do the opposite as well - enabling always and just blacklist sites you don't want the extension to darken.) Along with uBlock Origin, Hide Comments Everywhere, and DownThemAll!, it's already one of my favorite add-ons. Great work, guys!