Examine source code of NULP Schedule Time

{
  "manifest_version": 3,
  "name": "NULP Schedule Time",
  "version": "0.0.0.7",
  "description": "NULP Schedule Time",
  "browser_specific_settings": {
    "gecko": {
      "id": "antonkitsera@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "css": [
        "style.css"
      ],
      "js": [
        "index.js"
      ],
      "matches": [
        "https://*.lpnu.ua/*"
      ]
    }
  ]
}