Examine source code of DNSSEC

{
  "manifest_version": 2,
  "name": "DNSSEC",
  "version": "1.1.1resigned1",
  "description": "Check the DNSsec status of every website you browse.",
  "permissions": [
    "tabs",
    "webRequest",
    "webNavigation",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "dnssec.js"
    ]
  },
  "page_action": {
    "browser_style": true,
    "default_title": "DNSSEC",
    "default_icon": "button/dns-insecure-64.png",
    "default_popup": "popup/insecure.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{70b4fb8a-ae41-4e66-99f5-0fa89e411d69}"
    }
  }
}