Examine source code of Wykop Extra

{
  "browser_specific_settings": {
    "gecko": {
      "id": "{7229c2df-893f-40b5-be07-91f8d401f059}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "manifest_version": 2,
  "name": "Wykop Extra",
  "version": "1.0.14",
  "description": "Lokalne ulubione, zwijanie artykułów i historia przeglądania Wykopu.",
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    "assets/we-icons.ttf"
  ],
  "background": {
    "scripts": [
      "assets/database.js",
      "assets/background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.wykop.pl/*"
      ],
      "js": [
        "assets/messages.js",
        "assets/appearance.js",
        "assets/wykop-extra.js"
      ],
      "css": [
        "assets/wykop-extra.css"
      ],
      "run_at": "document_idle"
    }
  ]
}