Examine source code of Twitch master bot

{
  "manifest_version": 2,
  "name": "Twitch master bot",
  "short_name": "twitchmaster bot",
  "version": "3.0.1",
  "content_scripts": [
    {
      "matches": [
        "https://twitchmaster.ru/*",
        "https://twitchmasterbot.ru/*"
      ],
      "js": [
        "jquery-3.5.1.min.js",
        "proxyBrowser.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "jquery-3.5.1.min.js",
      "socket.io.min.js",
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "tabs",
    "https://*.twitchmaster.ru/*",
    "https://*.twitchmasterbot.ru/*",
    "notifications"
  ],
  "browser_action": {
    "default_title": "Twitchmaster",
    "default_icon": "logo128.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "logo16.png",
    "48": "logo48.png",
    "128": "logo128.png"
  }
}