Examine source code of Localhost search HTTPS

{
  "manifest_version": 3,
  "name": "Localhost search HTTPS",
  "version": "1.3.2",
  "description": "URL https://localhost/?q= as Search engine",
  "icons": {
    "512": "icon512x512.png"
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "Localhost (https)",
      "search_url": "https://localhost/?q={searchTerms}",
      "keyword": "@localhost",
      "favicon_url": "icon512x512.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "localhost-search-https@example.com"
    }
  }
}