I closed a session of 30 tabs to install this update banking on the fact that they'd restore when I relaunched. They did not, despite my settings being cinfigured for them to do so. When I click the X at the top right, it still warns me that I'm closing thirty tabs, but I can't see any of them no matter what I try.

Of course this happens the one time I actually needed the tabs to restore. Super frustrating.