Examine source code of Mi Calendar UN

{
  "manifest_version": 3,
  "name": "Mi Calendar UN",
  "version": "1.0.0",
  "description": "Exporta tu horario de Uninorte (pomelo.uninorte.edu.co/mihorario) a Google Calendar como archivo .ics",
  "browser_specific_settings": {
    "gecko": {
      "id": "micalendarun@carlosconk.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "icons": {
    "16": "icons/16x16.png",
    "48": "icons/48x48.png",
    "128": "icons/128x128.png"
  },
  "action": {
    "default_popup": "src/popup.html",
    "default_icon": {
      "16": "icons/16x16.png",
      "48": "icons/48x48.png",
      "128": "icons/128x128.png"
    },
    "default_title": "Mi Calendar UN"
  },
  "content_scripts": [
    {
      "matches": [
        "*://pomelo.uninorte.edu.co/mihorario/*"
      ],
      "js": [
        "src/parser.js",
        "src/ics.js",
        "src/content.js"
      ],
      "css": [
        "src/content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "activeTab"
  ]
}