It shows that message to Firefox, but not Vivaldi. Must be looking at engine features, not a specific browser.
i am getting "WhatsApp Web only works in Google Chrome."
and i'm using latest chromium :/
Ha ha ... That's interesting :).
That's just horrible. I don't get why they would want to do this. Doesn't Facebook own Whatsapp now? Why would they want to send business to Google?
Because they are using some proprietary technology that is only available in Google Chrome. It will probably take time for Mozilla to adapt this... When Google announced Inbox, they said it would be later adapted to work with other browsers. I guess it is not on the top of their agenda.