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 :/

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?

Funny, i just went to Google.com with Firefox. I see no messages. I also went to Google.com with Safari, and saw a message that said "A faster way to browse the web! Install Google Chrome"

I suspect a "This site only works with chrome!" message only applies to older versions of Internet Explorer.

Crying wolf is so boring these days.

edit: Also i find it hilarious that you think Google would risk rejecting all users who aren't using Chrome. Talk about a great way to give your Search competition a legitimate case.

edit2: The downvoting is cute, and i hope it's because of my tone and not me calling out lies. "Anything but Chrome!" he says - absurd. By all means, downvote my tone, but i should hope outright lying gets similar treatment.