Examine source code of VK Play Live - Better UX

{
  "manifest_version": 2,
  "name": "VK Play Live - Better UX",
  "version": "2.0",
  "description": "Удобные функции для сайта vkplay.live",
  "content_scripts": [
    {
      "matches": [
        "*://*.vkplay.live/*"
      ],
      "js": [
        "vkplbux.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{fdf7c56d-3883-4f78-8951-c396065fe4cf}"
    }
  }
}