There is no CORS going on, the very same script use canvas on two other sections, so I guess that’s not the problem… it works on FireFox but breaks on LibreWolf:
https://privatebin.net/?401a54f23eea492d#6hEX1c73DVFHv7MJQaT5j6Nm4C9a29unnd4xzeeURpqU
Any idea what part LibreWolf doesn’t like? I’d like to fix it to work.
LibreWolf disables canvas by default, did you check that?