Examine source code of Xari-notifier

{
  "manifest_version": 2,
  "name": "Xari-notifier",
  "description": "Notification d'un live de Xari",
  "version": "1.4",
  "browser_action": {},
  "icons": {
    "64": "img/xari-not-live.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "notifications",
    "tabs"
  ]
}