title: local PHP file doesn't open in browser
body: <p>I just installed XAMPP on my Windows 7 PC, and wanted to test it with a local PHP file. Double-clicking the file opens a new tab in my browser (Firefox 16.0.1) but the file doesn't open. Instead the tab's label flashes between "connecting" and "new tab" about once per second, and I have a hard time closing the tab again.  </p>
  
  <p>I stopped Apache and even ended XAMPP, but no joy. Even reducing the file to the bare minimum doesn't help:</p>
  
  <pre><code>&lt;!DOCTYPE HTML&gt;
  &lt;html&gt;
  &lt;head&gt;
      &lt;title&gt;php test&lt;/title&gt;
  &lt;/head&gt;
  &lt;body&gt;
      Lorem Ipsum...
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Firefox does open the file if I rename it to a <code>.htm</code> file.</p>
  
  <p>Any ideas what's going on and how to fix it?</p>