Examine source code of GMScript by iHaskin

{
  "browser_action": {
    "default_icon": "img/icon_19.png",
    "default_popup": "popup.html",
    "default_title": "GMScript by Jupiter"
  },
  "content_scripts": [
    {
      "js": [
        "js/jquery.js",
        "js/script.js"
      ],
      "matches": [
        "*://*.vk.com/*",
        "*://vk.com/*",
        "*://*.ihaskin.ru/*"
      ]
    }
  ],
  "description": "Расширение Google Chrome для проверки игрока Город Мертвых.",
  "icons": {
    "49": "img/icon_49.png",
    "128": "img/icon_128.png"
  },
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuDdLp7BVWOvgfSAu0+MM6EjAMohBg0JOZlFLc1rQrNVq+woh66KvubiJCtFExEoO655DKigeCYUWghe3tPpebG6BJ8KmTe3qC/gFwGRefSD658qQfbnq3VVOyVrCMHpLV0CP3O8qDgCQxT8sfVcML6tcyr05DdBQEklg272pcMRiEjw8I2FVM2PEPAxsI3C3vyti8F0QeXH8YlH1KX0odwWW76LSpvARG9+3T2E9T6T9wuq+UwuWOKoFhoBQqfG1+/WlZlW9f2ueJ7q2eLVN74dZEdl8Pr47e+KUjQ9dWUC3uY2Ca2eYuhLgWyHFfiEO6c9wWw3JjhIgJ+AEKg0QYwIDAQAB",
  "manifest_version": 2,
  "name": "GMScript by iHaskin",
  "permissions": [
    "webNavigation",
    "tabs",
    "*://*.vk.com/*",
    "*://vk.com/*",
    "*://*.ihaskin.ru/*"
  ],
  "version": "20.1236",
  "applications": {
    "gecko": {
      "id": "gms_browser_plugin@ihaskin.ru",
      "strict_min_version": "50.0"
    }
  },
  "web_accessible_resources": [
    "img/icon_128.png",
    "js/jquery.js",
    "js/script.js"
  ]
}