Examine source code of Kungfu Panda Background

{
  "manifest_version": 2,
  "name": "Kungfu Panda Background",
  "version": "1.0.0",
  "description": "Offers an immersive experience with a Kungfu Panda Background.",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "icons": {
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{074afca6-e625-4f20-bca3-6b2fc564830d}"
    }
  }
}