Today I was trying to access WhatsApp Web in Firefox and then, this screen was displayed, with no messages, nor a QR code to scan:
It sounded strange, because I never had this issue. Then, I accessed some sites that identify the browser. Some said I'm using Chrome 53, and one was unable to identify my browser.
I'm 70% sure that I can't access WhatsApp Web due to this browser detecting issue. Is there something I can do about this? I'm using the most recent Firefox version provided by the Ubuntu software and Ubuntu 14.04.