Examine source code of NewTabPage

{
  "name": "New Tab Page",
  "version": "2.0",
  "manifest_version": 2,
  "description": "Redesigned new tab page featuring your bookmarks, most visited",
  "icons": {
    "16": "icon_16.png",
    "48": "icon_48.png",
    "128": "icon_128.png"
  },
  "permissions": [
    "bookmarks",
    "topSites"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "options_ui": {
    "page": "newtab.html#options",
    "chrome_style": false,
    "open_in_tab": true
  },
  "web_accessible_resources": [
    "newtab.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7d6728d9-942f-40ce-80e2-4e07902339f5}"
    }
  }
}