Examine source code of VkIdUnlocker

{
  "manifest_version": 2,
  "name": "VkIdUnlocker",
  "author": "kalaider",
  "version": "1.3resigned1",
  "description": "VkIdUnlocker shows real ID of the person",
  "icons": {
    "512": "logo.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://vk.com/*"
      ],
      "js": [
        "index.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "webRequest",
    "*://*.vk.com/*",
    "webNavigation"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c74fa484-fad6-4419-9026-e33680637982}"
    }
  }
}