Examine source code of Ryu7z Live Notification

{
  "manifest_version": 2,
  "name": "Ryu7z Live Notification",
  "description": "Crée une notification lorsque Ryu7z est en live.",
  "homepage_url": "https://leodesigaux.com/",
  "version": "0.0.4",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background_script.js"
    ]
  },
  "permissions": [
    "notifications",
    "storage",
    "alarms",
    "https://www.youtube.com/*"
  ]
}