I think it's very interesting for others to follow this. Now, we are leaving the original scope (not just changing a function, but modifying globals). read-onl

I think it's very interesting for others to follow this. Now, we are leaving the original scope (not just changing a function, but modifying globals). read-only globals even. But prepare for my counter: let frame = document.createElement('x'); document.body.appendChild(frame); if( frame.contentWindow.Function.toString.call(add).includes("multiplier") ) throw "boom!"; You might go to also kill "document.createElement", but there are many ways for me to get a new frame. I think when we come to the point where all these are disabled, I would say only a small fraction of the websites that use javascript would still properly operate. It would be your victory though. ;)