Not to sound obtuse, but that just sounds like browser history at that point. What sets it apart, aside from only storing the "fatal pages" - the pages that tabs were killed at?
Those of us who keep accumulating tabs often do so as a "I think I care about this in the near future" halfway bookmark. I don't know about you, but my browser history for just this morning (it's noon here) is already so extensive that it's worthless for that purpose. When I do need to find something with Onetab, it's maybe 1% of the size of my browser history or less.
EDIT: What's more is that when I reopen, it disappears from the list, whittling down what's left over until I can confidently press "delete all" for a given activation (it groups the tabs by which were open when you pressed it; but you can also drag and drop the "bookmarks" from one list to another)
Thank you for the OneTab elevator pitch. I'll give it a try.
Google and Mozilla have both completely shit on the entire idea of personal browsing continuity. Just close all your tabs at night, then go to the home page they provide and start from scratch every morning and nobody gets hurt.