Examine source code of Reply Chime

{
  "manifest_version": 3,
  "name": "Reply Chime",
  "version": "1.0.1",
  "description": "Plays a sound when a long reply on chatgpt.com finishes generating.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://chatgpt.com/*"
      ],
      "js": [
        "audio.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "reply-chime-7c8f2d1a@extensions.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}