Examine source code of Custom New Tab

{
  "manifest_version": 3,
  "name": "Custom New Tab",
  "version": "0.1.2",
  "description": "A customizable new tab page with draggable link cards.",
  "permissions": [
    "storage",
    "geolocation"
  ],
  "host_permissions": [
    "https://api.open-meteo.com/*",
    "https://geocoding-api.open-meteo.com/*",
    "https://api.unsplash.com/*",
    "https://images.unsplash.com/*"
  ],
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "custom-new-tab@local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}