Examine source code of Chomik linker

{
  "description": "Pokazuje ramkę z linkami do chomika",
  "manifest_version": 2,
  "name": "Chomik linker",
  "version": "1.3",
  "icons": {
    "48": "icons/linker-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.chomikuj.pl/*"
      ],
      "js": [
        "jquery-3.4.1.min.js",
        "chomiklinker.js"
      ],
      "css": [
        "chomiklinker.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "linker_help.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b22a2bee-82de-4a9f-8d16-c9ed2a924a14}"
    }
  }
}