title: how can i prevent firefox caching
body: <p>i tried a lot of possible solutions but i can't solve the problem:</p>
  
  <pre><code>&lt;meta http-equiv="Cache-control" content="no-cache"&gt;
  &lt;meta http-equiv="Cache-control" content="no-store"&gt;
  &lt;meta http-equiv="Cache-control" content="must-revalidate"&gt;
  &lt;meta http-equiv="pragma" content="no-cache"&gt; 
  &lt;meta name="expires" content="0"&gt;
  </code></pre>
  
  <p>these are not working. Can anybody help? I am using jsp/servlet. And application is a portlet for websphere portal 6.1.</p>