I mean you can say that about any tab add on really. You could mostly get it from some sort of auto bookmarking add on that additionally updated it based on browsing within a domain maybe and auto discarding on close although it still would nto quite be there because it would discard to much if you kept several tabs for a domain. I mean it might be able to recognize multiple tabs and save the bookmarks alright but the auto reaping I bet would mess up.