Examine source code of Tele Helper

{
  "manifest_version": 2,
  "name": "Tele Helper",
  "version": "1.6.2",
  "content_scripts": [
    {
      "matches": [
        "*://*.online.unicum.ru/*"
      ],
      "js": [
        "telemetria.js"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{56697bcf-6881-4ba0-a7fb-02640f29c56c}"
    }
  }
}