QUOTE(arthurbrown918 @ Dec 30 2024, 21:19)

how does one go about using a CSS?
Gotta use a user styles manager (similar yet different to Tampermonkey which is a userscript manager) via a plugin/extension/addon or whatever they're called in your browser that allows you to apply the css of your choice to the sites you want. The tested one in this thread and a rather popular choice is named "Stylus", which after install merely needs you press "Write new style", then copypaste the contents of the provided css (or just press
Import) and lastly press "Save" to get it working, along with the extra stuff
posted here. And that's all.
Just like with scripts there's a variety of stylesheets out there that do many things to many sites so could always get more use out of the styles manager if you so wish.