Examine source code of u-cursos-foxy

{
  "manifest_version": 3,
  "name": "u-cursos-foxy",
  "version": "1.0",
  "homepage_url": "https://github.com/Rajevic-0/u-cursos-foxy",
  "browser_specific_settings": {
    "gecko": {
      "id": "u-cursos-foxy-v0@Rajevic-0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "128": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.u-cursos.cl/*"
      ],
      "js": [
        "foxy.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "foxy.webm"
      ],
      "matches": [
        "*://*.u-cursos.cl/*"
      ]
    }
  ]
}