rtcvb32: I have never understood RSS or seen how to subscribe/unsubscribe (
I'm only aware Firefox before auto-subscribed you to like 5 but wasn't explained at all so always was ignored). If i did i probably would have kept up on certain things better.
In the olden days, you'd click the RSS feed icon on the page, but those are mostly gone. Nowadays, you need a feed reader add-on like Brief, Feedbro, Feeder, Smart RSS Reader, etc. or an online service.
Firefox never had a built-in feed reader. It had "live bookmarks" which were just bookmarks with titles that updated on their own. I never liked the feature and wasn't sorry to see it go, but Livemarks is available for those who miss it.