Examine source code of Punymax

{
  "manifest_version": 2,
  "name": "Punymax",
  "version": "1.1.3",
  "description": "An extension to protect you from homograph phishing attacks like göog1e.com or fącebook.com. MANDATORY: Set Server URL in extension options. Open about:config and set dom.dialog_element.enabled to true for correct display of the dialogs",
  "permissions": [
    "<all_urls>",
    "storage",
    "activeTab",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": true
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "icons": {
    "16": "img/icon16.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "web_accessible_resources": [
    "options.html",
    "results.html",
    "options.html",
    "history.html"
  ]
}