This is the danger of having allowed our webbrowsers to become a 2nd OS on top of your actual OS and give it access to your full computer's capabilities.
Ordinary people may have forgotten what a computer is, but scammers, corporations, nations, and hackers haven't
I'm honestly impressed at the fucking audacity of this malware-installing ad. It had put something in my clipboard that would have run a virus installer if I'd followed the instructions.