> 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.

They also removed the ability to preview RSS feeds, which is annoying because one of the few certain ways to subscribe to a feed was to preview it and then hit subscribe in whatever addon you were using.

In the past it was even possible to subscribe with whatever addon you prefered from the firefox RSS preview directly, but that was already lost after the jump to WebExtensions.

There are addons that restore RSS previews and improve on firefox' old feature.

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.

The Livemarks extension duplicates the feature pretty acceptably.

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.