> The "rss support" was a folder, filled with links named after the article titles.

You're describing the "live bookmarks" feature, which was only one part of the RSS functionality that was removed from Firefox. I never used live bookmarks, but I used the feed discovery and subscription functionality all the time -- only some of which can now be restored with addons.

It was an easy and simple way to get into RSS. I used to use it quite a bit. Just the effort of finding an RSS reader is enough to turn people off the service. Compare to Twitter, which exists on all platforms. I don't think we can underestimate the interface problem for RSS.

I actually used it considerably for my news site bookmarks on my bookmarks bar. It was great for just catching up on the day’s headline. It’s a feature I sorely miss.

You are describing the majority of rss readers. Newsboat could be said to be a folder, with a file inside called urls. Sure it's actually more than that, but that's the part you interact with.

So what's your point?

Though useless, I think that some RSS extensions were able to pull feeds from there.