title: $_SERVER["HTTP_REFERER"] is not working on Mozilla
body: <p>I have develop a simple modal box and I added <code>$_SERVER["HTTP_REFERER"]</code> so from specific referrer to do not appear. It works fine but the <code>$_SERVER["HTTP_REFERER"]</code> is not working on Mozilla. Is there any other way to do this?</p>
  
  <p>I am using the simple PHP code:</p>
  
  <pre><code>if ($_SERVER["HTTP_REFERER"] == "www.thedomain.com/article.php"){
  //Code to do not show the modal box
  }else{
  //code to show the modal box
  }
  </code></pre>