I’ve always hated modal interruptions, and Chrome has done what should have been done ages ago: made them modal per tab rather than per window. Apparently this is quite tricky in Cocoa, but I’m glad they bothered to make it happen. Death to modal interruptions!
Tab Modality: Chrome makes it happen
This post is over ten years old. Chances are, I've learned enough to have advanced my thinking about some of this stuff.