"I'd rather bet on something you can implement all by yourself without needing to wade through a thousand page spec."

pdf.js was obviously outside the bounds of what he said he wanted from the beginning. You stubbornly brought it up anyway, then gave a nasty, clichéd response when he pointed out exactly why it was the wrong answer.

"If it doesn't work for you, fix it" is ridiculous. It's saying "here's this thing that doesn't do what you want, go make it do what you want instead of using these other things that already do what you want".

If my mom can't open a pdf in pdf.js, I'm not going to tell her "Well mom, patches welcome."