Examine source code of IQHR Ext

{
  "version": "1.3.3",
  "manifest_version": 2,
  "name": "iqhr-extension",
  "description": "IQHR extension for recruiting",
  "author": "IQMEN",
  "icons": {
    "48": "icons/icon_48.png",
    "128": "icons/icon_128.png"
  },
  "permissions": [
    "http://10.168.204.115/api",
    "*://hh.ru/*",
    "*://*.hh.ru/*",
    "*://hh.ua/*",
    "*://*.hh.ua/*",
    "*://hh.kz/*",
    "*://*.hh.kz/*",
    "*://hh.uz/*",
    "*://*.hh.uz/*",
    "tabs",
    "cookies",
    "storage",
    "webRequest"
  ],
  "optional_permissions": [
    "*://*/*"
  ],
  "page_action": {
    "default_icon": {
      "16": "icons/icon_16.png",
      "24": "icons/icon_24.png",
      "32": "icons/icon_48.png"
    },
    "default_title": "iqhr",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "run_at": "document_end",
      "matches": [
        "*://*/Utils/LinkedinProfileAlt*",
        "*://hh.ru/*",
        "*://*.hh.ru/*",
        "*://hh.ua/*",
        "*://*.hh.ua/*",
        "*://hh.kz/*",
        "*://*.hh.kz/*",
        "*://hh.uz/*",
        "*://*.hh.uz/*",
        "*://superjob.ru/*",
        "*://*.superjob.ru/*",
        "*://linkedin.com/*",
        "*://*.linkedin.com/*",
        "*://avito.ru/*",
        "*://*.avito.ru/*",
        "*://facebook.com/*",
        "*://*.facebook.com/*",
        "*://vk.com/*",
        "*://*.vk.com/*",
        "*://ok.ru/*",
        "*://*.ok.ru/*",
        "*://github.com/*",
        "*://*.github.com/*",
        "*://stackoverflow.com/*",
        "*://*.stackoverflow.com/*",
        "*://habr.com/*",
        "*://*.habr.com/*"
      ],
      "all_frames": false
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "chrome_style": false
  }
}