Examine source code of Wikipedia ES

{
  "manifest_version": 2,
  "name": "Wikipedia ES",
  "description": "Busca en wikipedia.org en español",
  "version": "1.0",
  "applications": {
    "gecko": {
      "strict_min_version": "55.0"
    }
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "Wikipedia",
      "search_url": "https://es.wikipedia.org/w/index.php?title=Special:Search&search={searchTerms}",
      "keyword": "wiki",
      "favicon_url": "https://es.wikipedia.org/static/favicon/wikipedia.ico",
      "is_default": false,
      "encoding": "UTF-8"
    }
  }
}