By the "choas monkey test" do you mean the annoying site in the parent comment? I'm using FireFox and it didn't do much for me. As I mentioned in another comment, I have set popups to appear in tabs, and that seems to mostly neuter the site.
It still managed to go full screen and play audio in the form of Nyein cat and some text to speech, which admittedly was annoying. But I managed to close the site and any "popup" tabs it made with two actions: Alt+F4 (I'm on Windows) followed by clicking "leave page". I had opened the site in its own window so my existing tabs were unaffected, but I wouldn't have been much worse off if I hadn't.
I believe Safari has an option to send all popups to tabs rather than new windows, so it is probably affected to a similar (low) level as FireFox. But I don't believe that Chrome has this option.
It still managed to go full screen and play audio in the form of Nyein cat and some text to speech, which admittedly was annoying. But I managed to close the site and any "popup" tabs it made with two actions: Alt+F4 (I'm on Windows) followed by clicking "leave page". I had opened the site in its own window so my existing tabs were unaffected, but I wouldn't have been much worse off if I hadn't.
I believe Safari has an option to send all popups to tabs rather than new windows, so it is probably affected to a similar (low) level as FireFox. But I don't believe that Chrome has this option.