Raspberry Pi Kiosk Helper

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Raspberry Pi Kiosk Helper",
  "description": "This extension shows a custom error page. Waits a few min then tries to reload the original page.",
  "version": "1.0.7",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "kiosk_enabled": true,
  "incognito": "split",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "background.html",
    "default_title": "Click here!"
  },
  "background": {
    "scripts": [
      "app.js"
    ],
    "persistent": true
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "alarms",
    "webRequest",
    "*://*.elauwit.net/",
    "*://*.myelauwit.net/"
  ]
}