title: Error in launching Chrome Extension for a specific page
body: <p>I'm writing a simple Chrome extension that displays a JavaScript alert saying "Hello World". In this example I have specified that the extension will only run for google.com (by putting this in the permissions property within manifest.json). </p>
  
  <p>Even after everything in the target page has loaded, the alert doesn't appear. Here is my script so far:</p>
  
  <p><strong>File: manifest.json</strong></p>
  
  <pre><code>{
    "name": "Hello",
    "version": "1.0",
    "description": "Says hello to Google",
    "permissions": ["http://*.google.com/"]
    "browser_action": {
      "popup": "Hello.html"
    }
  }
  </code></pre>
  
  <p><strong>File: Hello.html</strong></p>
  
  <pre><code>&lt;script language="Javascript"&gt;
     alert("Hello World");
  &lt;/script&gt;
  </code></pre>