Why doesn't document.addEventListener('load', function) work in a greasemonkey script?

Question

It doesn\'t give an error, and I put a console.log(\'loaded userscript wifi-autologin\'), the console.log works, but the intended effect of the doc

Answer 1

Apparently, document.addEventListener() is unreliable, and hence, my error. Use window.addEventListener() with the same parameters, instead.