Examine source code of Wywrotka

{
  "manifest_version": 2,
  "name": "Wywrotka",
  "version": "1.0",
  "description": "Odblokowuje dostep do spiewnika Wywrota, usuwajac monit logowania.",
  "icons": {
    "48": "icons/wywrotka-48.webp",
    "128": "icons/wywrotka-128.webp",
    "512": "icons/wywrotka-512.webp"
  },
  "content_scripts": [
    {
      "matches": [
        "*://spiewnik.wywrota.pl/*"
      ],
      "js": [
        "wywrotka.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7b550509-85ca-44eb-9356-c756b99df422}"
    }
  }
}