Examine source code of YouTube Notes

{
  "manifest_version": 3,
  "name": "YouTube Notes",
  "version": "1.1",
  "description": "Aggiunge un editor di note personalizzato sotto i video di YouTube.",
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-notes@example.com",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_end"
    }
  ]
}