Examine source code of Twitter One-Click Search

{
  "name": "Twitter One-Click Search",
  "description": "Add Twitter to your One-Click search engines",
  "version": "0.1.1",
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "twitter@search.dannycolin.com",
      "strict_min_version": "64.0"
    }
  },
  "developer": {
    "name": "Danny Colin",
    "url": "https://dannycolin.com"
  },
  "icons": {
    "16": "favicon.png"
  },
  "web_accessible_resources": [
    "favicon.png"
  ],
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "Twitter",
      "keyword": "@tw",
      "search_url": "https://twitter.com/search?q={searchTerms}"
    }
  }
}