PHP Error Alert

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "PHP Error Alert",
  "version": "1.5",
  "description": "Shows a notification alert if there's a PHP error.",
  "options_page": "options.html",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "warning-19.png",
    "default_popup": "pop-up-menu.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "js/jquery-2.2.1.min.js",
        "js/jquery.noty.js",
        "js/topRight.js",
        "js/default.js",
        "contentscript.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "icons": {
    "48": "warning-48.png",
    "128": "warning-128.png"
  },
  "permissions": [
    "storage"
  ],
  "manifest_version": 2
}