Next time you have to access WhatsApp on your desktop, you won't need to fire up Chrome if it's not your preferred browser. The messenger's web client now works on both Firefox and Opera, giving you more choices on the computer, though you'll still obviously have to settle if you're a Safari fan. That's pretty much all that's changed: the sign up process remains the same, so you will be prompted to scan a QR code with the mobile app in order to start using the web client like we mentioned when the product launched. Unfortunately, that also means iPhones still don't have the capability to scan that QR code (Windows Phone, BlackBerry and Android devices can), forcing faithful iOS users to stick to their mobile devices.
WhatsApp Web: https://t.co/BPQLxqKDSj - Firefox and Opera browsers are now supported! pic.twitter.com/D4aQiy5IC6- WhatsApp Inc. (@WhatsApp) February 25, 2015