I'll add that another thing that is pretty easy to do is to add a Dark Mode to websites that don't have one. All you need is a userContent.css/uBlock rule like
@media (prefers-color-scheme: dark) {
body {
background-color: #111 !important;
color: #eee !important;
}
/* etc, more stuff here depending on site */
}
, and ta-da! Dark mode respecting your OS dark/light setting based on pref or time of day :)