Any Global Ways to Prevent Websites from Changing How Highlighting Works?

I know I have done this before, but I got a new computer and it doesn't have all the same custom settings I had in my browsers on the old one. Certain websites try to be real cool and come up with their own right-click and/or highlight-text systems.

I think the right-click thing can be stopped by simply changing a browser setting (I use FF, so it's dom.event.contextmenu = false).

However this doesn't seem to prevent a website from being real cute and deciding to change what color to highlight text with. Sorry, this is my computer, and I already have a setting for that.

So by any chance is there a way for uBlock to do this? I realize there could be more than one way for a website to do that. The one that prompted me to set this up was geeksforgeeks.org. It makes text green when highlighted. Also seems to have broken the cursor so that it doesn't change to a text cursor when hovering over the text. Not sure if that's going to be the same cause or not.

EDIT: I hope this isn't a repost. Reddit (AI apparently) is only showing me the draft of this post, and telling me to post it in r/Firefox instead. Where of course it will never stand a chance of being seen as they hate questions there. If this turns out to be a double-post I'm happy to delete it or a mod can. Reddit does not link me to the original post, just gives me the draft of this post to edit.