Examine source code of BotKZ Live

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "BotKZ Live",
  "description": "BotKZ Live est une extension qui notifie l'utilisateur si BotKZ est en train de stream sur Twitch.",
  "version": "1.3",
  "manifest_version": 2,
  "icons": {
    "48": "icons/icon.png",
    "128": "icons/icon.png"
  },
  "permissions": [
    "notifications",
    "https://api.twitch.tv/"
  ],
  "browser_action": {
    "default_title": "BotKZ Live",
    "default_icon": {
      "48": "icons/icon.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{49a8f569-c91f-43cd-987d-44d2639e47e0}"
    }
  }
}