Examine source code of Google Docs Notepad

{
  "manifest_version": 2,
  "name": "Notepad",
  "version": "1.2",
  "description": "Creates a notepad for use with Google Docs. Take notes, save, and export or import with JSON files.",
  "permissions": [
    "https://docs.google.com/*"
  ],
  "icons": {
    "48": "./icons/notepad-48.png",
    "96": "./icons/notepad-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://docs.google.com/document/*"
      ],
      "js": [
        "./quill.js",
        "./notepad.js"
      ],
      "css": [
        "./quill.snow.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{fb3dad01-a12b-4cdc-8c1d-75bb7756f209}"
    }
  }
}