Differences when installing on a Pi4B 4Gb (as oppose to my previous installs on a 3B):
- don't install unclutter or create the autostart file (/home/pi/.config/lxsession/LXDE-pi/autostart) - bad, bad things happen
- puppetter needs to have all the debian dependencies: https://gist.github.com/HugoJBello/a9eb0f36a141dbad31511b42fef8030b
- puppeteer only works with the Pi install version of Chroumium 72. If you have 74, you'll have to downgrade to 72 and then link you script to it: puppeteer/puppeteer#5207