Examine source code of YouTube Music Webhook

{
  "manifest_version": 2,
  "name": "YouTube Music Webhook",
  "version": "4.8",
  "description": "Sends a webhook with the currently playing track on YouTube Music.",
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "http://*/",
    "https://*/"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://music.youtube.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon_16x16.webp",
      "48": "images/icon_48x48.webp",
      "128": "images/icon_128x128.webp"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "db147f9a-676b-4602-bf66-470fb69acd54@example.com"
    }
  }
}