Works on firefox mobile too, just have to go to extensions for all firefox (as opposed to the default mobile firefox extensions page), and add it from there.
I was generalizing to more sites than just reddit.
Mostly I see a ton of ai slop that pollutes google search results, you’ll see an intro paragraph that looks vaguely coherent, but the more you scroll, the more apparent you’re reading ai slop.
Wouldn't know about this thanks to old.reddit.com - once that's gone I don't see much reason to use Reddit.