Firefox 25 and OS X

I have a MacBook and just installed firefox 25. Now I already had norton 360 intalled and the norton toolbar enabled on Firefox 25 but identity safe does not appear and/or does not work. I checked both Firefox and Norton and they are both up to date, what do I do to get Identity Safe working on Firefox?

<script id="ncoEventScript" type="text/javascript">// function DOMContentLoaded(browserID, tabId, isTop, url) { var object = document.getElementById("cosymantecnisbfw"); if(null != object) { object.DOMContentLoaded(browserID, tabId, isTop, url);} }; function Nav(BrowserID, TabID, isTop, isBool, url) { var object = document.getElementById("cosymantecnisbfw"); if(null != object) object.Nav(BrowserID, TabID, isTop, isBool, url); }; function NavigateComplete(BrowserID, TabID, isTop, url) { var object = document.getElementById("cosymantecnisbfw"); if(null != object) object.NavigateComplete(BrowserID, TabID, isTop, url); } function Submit(browserID, tabID, target, url) { var object = document.getElementById("cosymantecnisbfw"); if(null != object) object.Submit(browserID, tabID, target, url); }; // </script>