Examine source code of VKAutoCaptcha

{
  "manifest_version": 2,
  "name": "VKAutoCaptcha",
  "description": "Extension adapted for automatic captcha solving on vk.com",
  "author": "Defasium (https://github.com/Defasium) and Eremey (https://github.com/eremeyko)",
  "version": "1.6.6",
  "permissions": [
    "storage",
    "tabs",
    "*://api.vk.com/*",
    "*://vk.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://vk.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48_1.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": "icon48_0.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d6355304-96fb-4f97-954e-47ebe24d06a0}"
    }
  }
}