I’ve had a few websites tell me to view their website in Chrome. I just leave, because no way am I putting any kind of personal data into a website run by such incompetent people.
I used to be a web developer. Back 8 years ago, you used to have to do a lot of special tricks to make your website look and function the same in all the browsers. Now, you really don’t. Unless you’re using some really obscure closed source codec or something, websites literally render and function properly without needing any browser specific code fixes.
There’s no excuse, unless you’re blocking older versions of every browser for security reasons, which is fine, because browsers update automatically these days, and it’s very rare for someone to be running a really old version.