Examine source code of YouTube OpenSearch Engine

{
  "name": "YouTube",
  "description": "YouTube",
  "manifest_version": 2,
  "version": "1.1.1",
  "applications": {
    "gecko": {
      "id": "youtube@aminomancer"
    }
  },
  "hidden": true,
  "icons": {
    "16": "favicon.svg"
  },
  "web_accessible_resources": [
    "favicon.svg"
  ],
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "YouTube",
      "search_url": "https://www.youtube.com/results",
      "search_form": "https://www.youtube.com/results?search_query={searchTerms}",
      "search_url_get_params": "search_query={searchTerms}",
      "suggest_url": "https://www.google.com/complete/search?ds=yt&output=firefox&q={searchTerms}",
      "suggest_url_get_params": "ds=yt&output=firefox&q={searchTerms}"
    }
  }
}