Examine source code of WebNovelPub Select Text

{
  "manifest_version": 2,
  "name": "WebNovelPub Select Text",
  "version": "2",
  "description": "Build an Extension!",
  "content_scripts": [
    {
      "matches": [
        "https://www.webnovelpub.com/novel/*/*"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b7b145bb-0e17-4f02-a11b-bea8c9a227c5}"
    }
  }
}