Examine source code of kpd200_VK

{
  "manifest_version": 2,
  "name": "kpd200_VK",
  "description": "Позволяет просматривать статистику в объявлениях ВК.",
  "version": "1.0.28resigned1",
  "applications": {
    "gecko": {
      "id": "supports@kpd200.net",
      "strict_min_version": "43.0"
    }
  },
  "icons": {
    "48": "icons/border-48.png"
  },
  "author": "КПД 200",
  "content_scripts": [
    {
      "matches": [
        "*://vk.com/ads?*"
      ],
      "js": [
        "content/end.js"
      ]
    }
  ]
}