[blitmap]

Thank you very kindly for that. Mozilla would be the best source for stuff like this. :) I had looked on Youtube or on egghead.io and such, but I didn't really find what I wanted.

This is an offshoot, separate topic: I wish there were a Firefox extension for using the compatibility/emulator mode in Devtools to avoid fingerprinting. I want the website to always think I am 1920x1080 (a common res) and have it be easy to pan around in if the viewport does not match the dimensions of Firefox's window/tab.