Examine source code of Personal Search Router

{
  "manifest_version": 3,
  "name": "Personal Search Router",
  "version": "1.0.1",
  "description": "Route Firefox address-bar searches to ChatGPT, Google, Perplexity, or OpenAlex with short prefixes.",
  "homepage_url": "https://github.com/BoomerRawlings/personal-search-router",
  "icons": {
    "48": "icons/router.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "personal-search-router@local",
      "data_collection_permissions": {
        "required": [
          "searchTerms"
        ]
      }
    }
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "Personal Search Router",
      "search_url": "https://chatgpt.com/?q={searchTerms}",
      "keyword": "route",
      "is_default": true,
      "favicon_url": "icons/router.svg"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://chatgpt.com/*"
      ],
      "js": [
        "router.js"
      ],
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "permissions": [
    "storage"
  ]
}