Examine source code of MCGL Online

{
  "version": "0.2.9",
  "default_locale": "ru",
  "manifest_version": 2,
  "name": "MCGL Online",
  "short_name": "MCGL Online",
  "description": "Мониторинг позволяет просматривать онлайн игроков состоящих в сообществах форума https://forum.minecraft-galaxy.ru",
  "icons": {
    "48": "img/icon48.png",
    "64": "img/icon64.png",
    "128": "img/icon128.png"
  },
  "background": {
    "scripts": [
      "forum_helpers/background.js",
      "safeResponse.js",
      "dateHelper.js"
    ]
  },
  "permissions": [
    "storage",
    "http://forum.minecraft-galaxy.ru/*",
    "https://forum.minecraft-galaxy.ru/*",
    "https://pavelstudio.com/*",
    "tabs"
  ],
  "browser_action": {
    "default_title": "MCGL",
    "default_icon": "/img/icon48.png",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://forum.minecraft-galaxy.ru/*"
      ],
      "js": [
        "jquery.js",
        "jquery-ui.js",
        "settings.js",
        "content.js",
        "dateHelper.js",
        "safeResponse.js",
        "forum_helpers/bb-garants-post.js",
        "forum_helpers/bb-lupa.js",
        "forum_helpers/bb-userdoc.js",
        "forum_helpers/invite-community.js"
      ]
    }
  ]
}