Examine source code of Jigglypuff Background

{
  "manifest_version": 2,
  "name": "Jigglypuff Background",
  "version": "1.0.0",
  "description": "The scene is bathed in the soft glow of a full moon, casting a calming blue light across the forest.",
  "icons": {
    "128": "188993.png"
  },
  "permissions": [
    "geolocation"
  ],
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ff19bc2c-7ec5-4184-9ef4-0a09918e8327}"
    }
  }
}