title: How to open chrome-extension in new tab by default
body: <p>How to open chrome-extension in new tab by default? Not in the new pop-up as like the present time.<br>
  I have the:</p>
  
  <pre><code>//manifest.json    
  {
      ...
      "background": {
              "scripts": ["js/background.js"],
              "persistent": false
          },
      "browser_action": {
              "default_title": "Test Viewer v.1.0",
              "default_icon": "icon.png",
              "default_popup": "index.html"
          },
      "permissions": [
              "unlimitedStorage",
              "notifications",
              "activeTab",
              "tabs",
              "https://docs.google.com/*",
              "downloads"
          ]
      ...
      }
  </code></pre>
  
  <p>and </p>
  
  <pre><code>//background.js
  chrome.browserAction.onClicked.addListener(function(tab){
       chrome.tabs.create({
          url: ("index.html"),
          type: "normal"
      });
  });
  </code></pre>
  
  <p>In the docs <a href="https://developer.chrome.com/extensions/windows" rel="nofollow noreferrer">https://developer.chrome.com/extensions/windows</a> this type is specified as <code>type: "normal"</code> which open the "normal browser window" as I wish, but it doesn't work. 
  Where is error?</p>