The latest Stylish update in chrome introduced tracking btw. It now "calls home" by fetching the "recommended styles for this site" even when the popup isn't open. You can check the network traffic in the `background.js`.
Here's a greasemonkey script I'm using: https://gist.github.com/Zren/8726ccca22659baaeb055fd0258df76...
Is this true on firefox, as well? I use firefox.
Don't think so. I think the Firefox store has different rules and/or a different maintainer.
https://addons.mozilla.org/en-US/firefox/addon/stylish/revie...
Stylish makes the most sense, because it is a CSS-only solution. Using javascript for this sort of thing is hackish.
https://userstyles.org/styles/37035/github-dark