Examine source code of Quick Image Print

{
  "author": "igorlogius",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "256": "icon.png"
  },
  "manifest_version": 2,
  "name": "Quick Image Print",
  "permissions": [
    "menus",
    "tabs",
    "cookies",
    "<all_urls>"
  ],
  "version": "1.2.3",
  "browser_specific_settings": {
    "gecko": {
      "id": "{7a279b87-1980-4d55-9cf7-bd200e5d56ee}"
    }
  }
}