Examine source code of QR Code Generator

{
  "manifest_version": 2,
  "name": "QR Code Generator",
  "version": "1.0",
  "description": "Genera un QR Code della pagina attuale",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "applications": {
    "gecko": {
      "id": "info@gabrielerusso.it",
      "strict_min_version": "60.0"
    }
  },
  "icons": {
    "48": "icon.png"
  }
}