Rated 5 out of 5 stars
Edit: Cool. I group all my feeds into folders and didn't consider that an individual feed would have a separate right-click menu and settings. Changed to 5 stars, thanks!
Good add-on, works exactly as I'd hope with one exception. There doesn't seem to be any option to disable notifications for "updated" entries. My local library and youtube incessantly "update" hundreds of entries which I have no interest in as I've already seen them, so my feed ends up being quite cluttered. Since the add-on can already differentiate these from actual new entries, I'd really appreciate a way to ignore them altogether.
There is an option in the feed settings (right-click the feed in the sidebar) to not mark updated entries as unread.