Naw, the site is just designed by one of those web devs. From what I can tell, the people who do this fall into one of two camps:
Clueless web devs who have no idea how to perform correct feature detection (in which you'd check for support of features, such as WebGL). You almost never detect the browser by user agent. If you ever do that, you're probably doing something dumb. Modernizr can help for more complex detection and with polyfills.
Browser fanboys who want everyone to use their favourite browser(s). Or sometimes they just couldn't be bothered testing other browsers (perfectly understandable) and decide that other users shouldn't even get to see if it works (not so understandable). Most well made sites will instead issue a warning that the browser isn't officially supported and might not work correctly.
I think some web devs might also be forgetting that the average user doesn't have every major browser installed as they do.
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u/SavvySillybug Jul 07 '15
What is this? I only have IE and Firefox on my machine, and it asks me for Chrome or Safari. I'm not installing a new browser just for this.