This extension is almost but not exactly quite what I am looking for. I really really dig the idea but the way that sessions work essentially just makes this a more complicated history tab. I would like the option to update and overwrite an auto save instead of creating a whole new save. With autosave a new save is created that overwhelms manually created sessions. I would expect the behavior that each window is an independent save and duplicates are not created. Additionally with events such as window and browser closing, the save feature creates multiple identical and redundant sessions.