Facebook Javascript SDK Problem: "FB is not defined"

Question

The following code, copied from the Facebook documentation here, is not working for me in Chrome.

<div id="fb-root"></div> <script src="http://connect.facebook.net/en_US/all.js"></script> <script>   FB.init({   appId  : 'YOUR APP ID',   status : true, // check login status   cookie : true, // enable cookies to allow the server to access the session   xfbml  : true  // parse XFBML }); </script> 

In the Javascript console I get:

Uncaught ReferenceError: FB is not defined 

I'm not having any problems with the SDK in Firefox or Safari, just Chrome.

Answer 1

I saw a case where Chrome had installed WidgetBlock which was blocking the Facebook script. The result was exactly this error message. Make sure you disable any extensions that may interfere.