Examine source code of IP Check

{
  "manifest_version": 2,
  "name": "IP Check",
  "version": "3.2",
  "description": "Показывает всю информацию о вашем IP",
  "permissions": [
    "activeTab",
    "alarms",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon-16.png",
      "48": "icon-48.png",
      "64": "icon-64.png",
      "128": "icon-128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8e6f5105-4af8-43d1-98e4-05ea215c6da8}"
    }
  }
}