Comment 85 for bug 483929

>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.

If we don't get a Home Tab landed, then we should probably go back to treating this tab like a modal dialog box. Ideally though the user should have a variety of targets to move forward (home tab, new tab, tab close button).