A few websites refuse to present content if you use a browser other than one of the four or so big-name ones.
The example shown is what I got when I accessed Apple’s support site with iCab, a relatively obscure browser which I often use. Many of Google’s pages also refuse to deliver content to iCab.
Browsers can impersonate other browsers by setting the User-Agent header, and small-name browsers usually provide that option for getting around these problems. After a couple of tries with iCab, I was able to get through by impersonating Safari. Doing this also has an advantage for privacy; identifying yourself with a little-used browser can greatly contribute to unique identification when you may want anonymity. From the standpoint of good website practices, though, a site shouldn’t be locking browsers out unless there’s an unusual need. Web pages should follow standards so that they’re as widely readable as possible. This is especially important with a “contact support” page.
Apple and Google both are browser vendors. Might we look at this as a way to make entry by new browsers more difficult?