title: Mousewheel event detection not currently working in Firefox
body: <p>For some reason I'm having trouble trying to recognize the mousewheel event in Firefox. This is working in IE, Chrome, Safari, Opera but not FF. I am attaching an event listener on DOMMouseScroll, which should be recognized in FF.</p>
  
  <p><a href="http://jsfiddle.net/YU4JM/" rel="nofollow">Fiddle demo</a></p>
  
  <pre><code>$(document).unbind('mousewheel DOMMouseScroll').on('mousewheel DOMMouseScroll', function(e) {
      var evt = event || e || window.event;
      var delta = evt.detail &lt; 0 || evt.wheelDelta &gt; 0 ? 1 : -1;
  
      if (delta &lt; 0) {
          // scroll down
      } else {
          // scroll up
      }
  });
  </code></pre>