Examine source code of Yahoo jp

{
  "manifest_version": 2,
  "name": "Yahoo jp",
  "description": "Adds a search engine that searches Yahoo.co.jp",
  "version": "1.0",
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "yahoo.co.jp",
      "search_url": "https://search.yahoo.co.jp/search?&q={searchTerms}",
      "favicon_url": "https://s.yimg.jp/i/docs/integrate/images/service/msc/icon.png",
      "is_default": false,
      "encoding": "UTF-8"
    }
  }
}