Examine source code of Journey Through

{
  "version": "1.0",
  "name": "Journey Through",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "description": "A winding road nestled between two massive red rock cliffs",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{e58e0ecc-58fb-4e84-9858-45845b507cf9}"
    }
  }
}