title: Facebook JS API initialization error in Firefox: "Couldn't parse invalid source chrome-extension"
body: <p>I've got a simple page using the Facebook JS API that is causing errors in Firefox 27.0.1.  I have stripped it down to just the initialization code, and I'm still getting the errors.  I'm NOT getting the errors in IE.  (I've replaced the real app ID with 1's.)</p>
  
  <p>Any idea what's causing this?  Why is there a "chrome-extension" error in Firefox?</p>
  
  <p><img src="https://i.stack.imgur.com/XqbB8.png" alt="Screenshot of errors"></p>
  
  <pre><code>&lt;http&gt;
  &lt;head&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;div id='fb-root'&gt;&lt;/div&gt;
  &lt;script type="text/javascript"&gt;
  window.fbAsyncInit = function() {
  FB.init({
  appId : '1111111111111111',
  status : true,
  xfbml : true
  });
  };
  (function(d, s, id){
  var js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) {return;}
  js = d.createElement(s); js.id = id;
  js.src = "//connect.facebook.net/en_US/all.js";
  fjs.parentNode.insertBefore(js, fjs);
  }(document, 'script', 'facebook-jssdk'));
  &lt;/script&gt;
  &lt;/body&gt;
  &lt;/http&gt;
  </code></pre>