Works, but the fact that it saves sessions to bookmarks is annoying. That Interferes with managing your bookmarks, because you never know if you actually bookmarked a page, or if it's buried somewhere in saved sessions. Session Manager, I miss you!
EDIT: In reply to the dev's comment: I recommend you listen what people say. I did read the description, I knew that it was going to save to favorites, but I still don't like it that it does that.