> They're only capable of hiding ads on the page. This point is untrue, at least in Safari, there is beforeload event and canLoad[1] function for preventing co

> They're only capable of hiding ads on the page. This point is untrue, at least in Safari, there is beforeload event and canLoad[1] function for preventing content from being loaded at all, not just hiding it after it is loaded. https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/MessagesandProxies/MessagesandProxies.html#//apple_ref/doc/uid/TP40009977-CH14-SW9 https://developer.apple.com/library/safari/documentation/Too...