Examine source code of Generate QR codes

{
  "name": "QR Code Generator",
  "description": "QR Code Generator to easily generate QR Code for the URL",
  "background": {
    "scripts": [
      "bg.js"
    ]
  },
  "version": "0.0.8",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "1.png"
    }
  },
  "short_name": "URL QR Code Generator to generate QR code for the webpages just by clicking the extension",
  "icons": {
    "16": "1.png",
    "48": "2.png",
    "128": "3.png"
  },
  "permissions": [
    "activeTab"
  ],
  "manifest_version": 2
}