The only developers who make sites that work just in Chrome or Safari are rank amateurs. No professional would do such a thing. Professionals understand that a web site must work for all visitors and I have never heard of any web site that would do otherwise. To me, this is only an internet rumor and not based in reality.<p>The only exception would be when one particular feature is needed to display one specific, unique element. Off the top of my head, I can&#x27;t think of what that would be.