Since WhatsApp Web is obfuscated, I don't really
know why but when you have privacy.resistFingerprinting
on true
the QRCode
used to connect to your phone disappears instantaneously after loading.
This simple ViolentMonkey's script will fix this "glitch".
Tested on Linux / Windows && Firefox.
Install using this URL:
https://raw.githubusercontent.com/antipatico/bypass-whatsapp-web-anti-antifingerprint/master/BypassWhatsAppWebAntiAntiFingerprint.js