Comment 84 for bug 483929

FTR, this was pretty confusing and surprising to me when I saw the change today; not sure if some of that will be resolved in zpao's follow-up work or not.

Alex: I'm assuming your comment 62 meant to imply that the recommended action here is always to restore the session, so that's the Very Obvious Path. As Dao said in comment 63, the user can't actually close this tab in the usual case of restoring-from-crash, so it's actually now pretty hard to get to a new, blank session.