(author here)... I honestly was scared of it first, as I thought if I edited the code, I'd accidentally change/update the other persons website...
So I opened the inspector to remove that event handler or whatnot.
My girlfriend was sitting next to me. "What are you doing?", "Oh, just need to edit this so it allows me to continue." The look on her face was priceless. "You-you c-can do that?! You're allowed to just do that?!" To be fair, I can understand her apprehension as I was wearing a balaclava and black gloves.
I just overwrote `window.hasFocus()` to always return true in the browser console.
This felt (and still feels) like magic.
Like this guy?
Was it sticky?