Speaking for myself, I'm not going back to Chrome over this alone -- I'm pleased with how FF57 handles and enough of Mozilla's positive efforts over time that I'm unlikely to let this event define them if they take steps to make sure it's an anomaly.

But every one of these things seems like legit issues that I'd like to see made an anomaly, and it's conceivable that if Mozilla isn't able to make it crystal clear that they know how to make things go that way, Chrome might well be the right choice.