This wins the award for the most annoying dialog in existence.
It pops up in Chrome/Mac dozens of times a day.
It's like a cyber-mosquito.
I think it's a plot to get me to provide input to algorithms guiding one of their driver-less cars. When the car has to make a decision it farms the task out to one of its slaves (i.e. me). If I choose to click Wait, the car makes a right turn. If I decide to kill the frozen tabs, it makes a left turn. If I leave the dialog up, well, I don't know what it does.
I hope I'm doing something useful. It's hard for me to believe that this is just a bug they haven't gotten around to fixing. No it must have some greater meaning. It must. It must. I'm talking to myself now.