Wait, onbeforeunload is going away too? So no more "you have unsaved changes are you sure you want to close the tab?" And yes, just make the popups modal to t

Wait, onbeforeunload is going away too? So no more "you have unsaved changes are you sure you want to close the tab?" And yes, just make the popups modal to the tab instead of modal to the browser and stop breaking the web with standards churn.