Examine source code of Extension Twitch Joy

{
  "manifest_version": 3,
  "name": "Extension Twitch Joy",
  "description": "Suivez le live de Joyintv en temps réel",
  "version": "7.9.2",
  "browser_specific_settings": {
    "gecko": {
      "id": "{f985118b-0d80-4d17-a2c0-413af8f7f024}"
    }
  },
  "action": {
    "default_popup": "index.html"
  },
  "icons": {
    "128": "img/logo.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "content_scripts": [
    {
      "js": [
        "jquery-3.6.0.js",
        "check.js"
      ],
      "matches": [
        "https://joyintv.fr/*"
      ]
    }
  ],
  "host_permissions": [
    "https://api.twitch.tv/*"
  ],
  "permissions": [
    "storage",
    "alarms",
    "notifications",
    "tabs"
  ]
}