Examine source code of Sortowanie Allegro

{
  "manifest_version": 2,
  "name": "Sortowanie Allegro",
  "version": "1.0",
  "description": "Wtyczka do sortowania wyników wyszukiwania na Allegro",
  "permissions": [
    "https://allegro.pl/listing?string=*"
  ],
  "icons": {
    "16": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://allegro.pl/listing?string=*"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{df50a3b7-b94a-4c85-baa5-43f32f285b11}"
    }
  }
}