title: Chrome Extension opens a panel in a loop, doesn't stop
body: <p>I'm creating a Chrome Extension that will not open on popup, but in a panel.</p>
  
  <p>The JavaScript is </p>
  
  <pre><code>chrome.windows.create({
      url:"PrincipalOnlineC2C.html",
      type:"panel",
      width:350,
      height:400
  });
  </code></pre>
  
  <p>The problem with this is that when I open the Extension, it never stops creating new panels. How do I do to open just one panel?</p>