Examine source code of Amazon Smile Search

{
  "manifest_version": 2,
  "name": "Amazon Smile Search",
  "description": "Add Amazon Smile to your search engine. ",
  "version": "1.0",
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "Amazon Smile",
      "search_url": "https://smile.amazon.com/s?k={searchTerms}",
      "keyword": "@amazon",
      "favicon_url": "https://smile.amazon.com/favicon.ico",
      "is_default": false,
      "encoding": "UTF-8"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a227b7e7-421c-4174-9021-12199653bad9}"
    }
  }
}