Examine source code of Custom New Tab Dashboard

{
  "manifest_version": 2,
  "name": "Custom New Tab Dashboard",
  "version": "1.0",
  "description": "A customizable new tab page with widgets and themes",
  "permissions": [
    "storage",
    "tabs",
    "topSites",
    "bookmarks",
    "weather",
    "geolocation"
  ],
  "chrome_url_overrides": {
    "newtab": "dashboard/dashboard.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1e617efc-3c37-41f9-b057-eb9610674820}"
    }
  }
}