Well, after overcoming my own ignorance, I must say that this is the perfect replacement for Firefox's live bookmarks. Furthermore, the support is outstanding. Just remember, Livemarks creates a bookmark folder for any given rss feed. Just drag that folder to your bookmark toolbar and, voila, live bookmarks lives again. This add-on allowed me to update my Firefox 60 to Firefox 78 and retain the functionality that I wanted. Can't say enough.