Dark Reader generates dark themes for websites on the fly. Use the night mode to take care of your eyes. Adjust brightness and contrast to better fit your screen.
Darker Medium applies a customizable dark theme to *all* medium formatted stories. You can customize the header background, main accent color, highlight color and link styles separately from the option menu. No matter the domain, if a site is using Medium, it will get a dark theme; that is the main advantage over Stylus and Stylish.