Examine source code of web-fast-nav

{
  "manifest_version": 2,
  "name": "web-fast-nav",
  "version": "1.1resigned1",
  "description": "Helps to navigate quickly thought web",
  "icons": {
    "48": "icons/app.png"
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d8392c0-ad86-4e8c-b580-2693b549c559}"
    }
  }
}