Examine source code of Youtube-control

{
  "manifest_version": 2,
  "name": "Youtube-control",
  "version": "1.0.2",
  "description": "Choose the maximum hours of youtube for one day !",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "webNavigation",
    "storage",
    "tabs",
    "notifications"
  ],
  "browser_action": {
    "default_icon": "icons/icon.png",
    "default_title": "Youtube control",
    "default_popup": "popup.html"
  }
}