title: Is it possible to detect Firefox users in pure CSS?
body: <p>Is it possible to detect Firefox Browser only with CSS like IE?</p>
  
  <p>for example, IE browser can be detected like: </p>
  
  <pre><code>&lt;!--[if IE 7]&gt;
     /* IMPORTING CSS FOR IE */
  &lt;![endif]--&gt;
  </code></pre>
  
  <p>Can be Firefox browser detected like this code?</p>