Examine source code of Smart Search Preview

{
  "manifest_version": 3,
  "name": "Smart Search Preview",
  "version": "1.0.0",
  "description": "検索結果にホバープレビューと右側固定プレビューを追加する拡張機能。",
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "background/background.js",
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.google.com/*",
        "https://www.google.co.jp/*",
        "https://www.bing.com/*"
      ],
      "js": [
        "content/content-script.js",
        "content/hover-preview.js",
        "content/preview-panel.js"
      ],
      "css": [
        "content/styles.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "smart-search-preview@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "assets/icons/icon16.png",
    "48": "assets/icons/icon48.png",
    "128": "assets/icons/icon128.png"
  }
}