title: preventDefault for save popup is working in chrome but not in firefox
body: <p>Hi i like to prevent the default behaviour of ctrl+s(save) so i tried the below code</p>
  
  <pre><code>jQuery(document).bind("keydown", function(e) {
    if(e.ctrlKey &amp;&amp; (e.which == 83)) {
      e.preventDefault();
      alert("Ctrl+S");
      return false;
    }
  }); 
  </code></pre>
  
  <p>But this is preventing only in chrome not in firefox.In firefox the save dialog is poping up why is this happening or am i missing something.Any help?</p>