Examine source code of Bibliographer

{
  "name": "Bibliographer",
  "description": "書籍の商品ページの書名の上に書誌情報を表示します。",
  "version": "1.0.52",
  "icons": {
    "128": "images/icon128.png"
  },
  "manifest_version": 3,
  "content_scripts": [
    {
      "matches": [
        "*://www.amazon.co.jp/*",
        "*://amazon.co.jp/*",
        "*://amazon.jp/*"
      ],
      "css": [
        "amazon_biblio.user.css"
      ],
      "js": [
        "amazon_biblio.user.js"
      ]
    }
  ],
  "homepage_url": "http://booksbar.jp/",
  "host_permissions": [
    "*://www.amazon.co.jp/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "images/*"
      ],
      "matches": [
        "*://www.amazon.co.jp/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ac468407-cd94-41a8-82f5-f005ef00cc9f}"
    }
  }
}