Examine source code of KAO Live

{
  "manifest_version": 3,
  "name": "KAO Live",
  "description": "Ne loupez plus un seul live Twitch de Kao.",
  "version": "3.1.1",
  "author": "Gwyomarch",
  "permissions": [
    "notifications",
    "alarms",
    "storage"
  ],
  "icons": {
    "64": "img/logo-64.png",
    "128": "img/logo-128.png",
    "256": "img/logo-256.png"
  },
  "action": {
    "default_icon": "img/logo-256.png",
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "host_permissions": [
    "http://localhost/",
    "https://gwyo-twitch.herokuapp.com/*/*"
  ],
  "content_scripts": [
    {
      "js": [
        "js/jquery.js",
        "js/config.js",
        "js/app.js"
      ],
      "matches": [
        "http://localhost/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{28492134-b242-4a87-b896-1545c27b0dd7}",
      "strict_min_version": "112.0"
    }
  }
}