title: Intl is not defined firefox
body: <p>I have following java scripts code which runing well in chrome but fail in firefox and IE.
  the error message of FF is 'ReferenceError: Intl is not defined'
  the error message of IE is 'SCRIPT5009: 'Intl' is undefined ' </p>
  
  <pre><code>&lt;script&gt;
  var co = new Intl.Collator('pinyin');
  console.log(co);
  var co = new Intl.Collator('zh-Hans');
  console.log(co);
  var co = new Intl.Collator('zh-Hans-CN');
  console.log(co);
  &lt;/script&gt;
  </code></pre>
  
  <p>I just wonder why the standard object Intl can't be refer in FF or IE? did I miss something?</p>