Examine source code of Image Viewer

{
  "manifest_version": 2,
  "name": "Image Viewer",
  "version": "1.0",
  "description": "Extensión que permite visualizar y navegar entre las imágenes de orinas de Infinity",
  "author": "Landra Sistemas",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_icon": "icons/icon16.png",
    "default_popup": "options.html"
  },
  "background": {
    "scripts": [
      "funciones.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{03dc1494-09ab-4f65-9027-c712e9c5de57}"
    }
  }
}