Examine source code of Wykop Extra

{
  "browser_specific_settings": {
    "gecko": {
      "id": "{7229c2df-893f-40b5-be07-91f8d401f059}"
    }
  },
  "manifest_version": 2,
  "name": "Wykop Extra",
  "version": "0.85",
  "description": "Dodatek wspomagający przegladanie strony wykop.pl",
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    "assets/we-icons.ttf"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.wykop.pl/",
        "*://*.wykop.pl/strona/*",
        "*://*.wykop.pl/tag/*",
        "*://*.wykop.pl/wykopalisko/*",
        "*://*.wykop.pl/hity/*",
        "*://*.wykop.pl/moj/*",
        "*://*.wykop.pl/najnowsze/*",
        "*://*.wykop.pl/aktywne/*",
        "*://*.wykop.pl/ulubione/*",
        "*://*.wykop.pl/link/*"
      ],
      "js": [
        "assets/jquery-3.5.0.slim.min.js",
        "assets/wykop-extra.js"
      ],
      "css": [
        "assets/wykop-extra.css"
      ]
    }
  ]
}