Examine source code of Quick Qr

{
  "name": "Quick QR - Free QR Code Generator",
  "version": "1.1.0",
  "description": "Quickly generate QR codes for the current page in one click 100% free, no ads! and offline support!",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "img/favicon.png",
    "default_title": "Quick Qr - Free QR Code Generator",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "quick-qr@byteperks.com",
      "strict_min_version": "48.0"
    }
  },
  "icons": {
    "16": "img/favicon.png",
    "32": "img/favicon.png",
    "64": "img/favicon.png",
    "128": "img/favicon.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "manifest_version": 2
}