Examine source code of Arthuuuurrrr

{
  "manifest_version": 2,
  "name": "Arthuuuurrrr",
  "description": "Check si votre streameur favori (Arthur) est en live",
  "version": "1.2",
  "icons": {
    "64": "img/icon.jpg"
  },
  "permissions": [
    "notifications",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/app.js"
      ]
    }
  ]
}