Examine source code of Goodriddance

{
  "manifest_version": 2,
  "name": "Goodriddance",
  "description": "An add-on to help looking for books from Goodreads on The StoryGraph",
  "version": "0.0.3",
  "icons": {
    "128": "icons/icon128.png",
    "512": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.goodreads.com/*/book/show/*"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2fb8e220-9b59-479d-9291-b4143b2331f4}"
    }
  }
}