Examine source code of PersiaHR Extension

{
  "manifest_version": 2,
  "name": "__MSG_info_name__",
  "version": "3.0.5",
  "author": "PersiaHR",
  "default_locale": "ru",
  "description": "__MSG_info_description__",
  "homepage_url": "https://www.persiahr.com/feature/single-database",
  "icons": {
    "16": "icons/button.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "tabs",
    "webNavigation",
    "notifications",
    "storage",
    "*://www.persiahr.com/*",
    "*://persiahr.com/*"
  ],
  "browser_action": {
    "default_icon": "icons/button_gray.png",
    "default_title": "PersiaHR.com"
  },
  "web_accessible_resources": [
    "res/loader.gif",
    "res/*.png",
    "assets/*",
    "icons/*.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "jquery-3.2.1.min.js",
        "contentPersia.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "main.js"
    ]
  },
  "content_security_policy": "script-src 'self'; object-src 'self'"
}