Examine source code of Whois Lookup

{
  "manifest_version": 2,
  "name": "Whois Lookup",
  "version": "1.0",
  "description": "Tra cứu thông tin Whois cho tên miền đang truy cập",
  "icons": {
    "48": "icons/icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/icon.png",
    "default_title": "Whois Lookup"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{197be075-cb1a-4e94-bcd8-4469e88b46cb}"
    }
  }
}