Examine source code of VKComents

{
  "manifest_version": 2,
  "name": "VKComents",
  "version": "1.0",
  "description": "delete VK coments",
  "icons": {
    "48": "vk.png"
  },
  "applications": {
    "gecko": {
      "id": "bdd@ddd",
      "strict_min_version": "45.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.vk.com/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ]
}