Examine source code of IDN Safe

{
  "name": "__MSG_extensionName__",
  "version": "1.5",
  "manifest_version": 2,
  "icons": {
    "48": "img/icon_48.png",
    "128": "img/icon_128.png",
    "512": "img/icon_512.png"
  },
  "description": "__MSG_extensionDescription__",
  "default_locale": "en_US",
  "background": {
    "scripts": [
      "js/constants.js",
      "js/punycode.js",
      "js/background.js"
    ]
  },
  "minimum_chrome_version": "50",
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "activeTab",
    "tabs",
    "<all_urls>"
  ],
  "browser_action": {
    "default_title": "IDN Safe",
    "default_icon": "img/icon_48.png",
    "default_popup": "html/popup.html"
  },
  "author": "Aykut Çevik"
}