Examine source code of Beautiful Wallpapers HD

{
  "manifest_version": 2,
  "name": "Beautiful Wallpapers HD",
  "version": "1.0",
  "description": "Enjoy HD wallpapers on every new tab.",
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "wallpaper@coinmasterhub.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}