Examine source code of QR Code Generator

{
  "name": "QR Code Generator",
  "description": "It helps you to generate the QR code based on the text you have provided🙂.",
  "version": "1.0.0",
  "manifest_version": 3,
  "action": {
    "default_popup": "index.html",
    "default_icon": "icon/128.png",
    "default_title": "QR Code Generator"
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "icons": {
    "16": "icon/16.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "author": "Santosh Bhandari",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApzcDUApdADmbcNYh+OJoL7NVZ8tRGqdl9gbn9zgbJAI3KmNPiLrp1/r04t1bPz8F/oNSEw4/RMrI9H/IY4buolvBTI1ezsdjBDJ9sgFkyJcvI1zQftrpfZOXII1TbApAlkGfNW0mdswZd2NEd+mIxek1FxtCwRrvjVP5SYXN12XMtBhfucN/FF8u/VHlp/b0goA93RbbWCTZS6CzjK5ymHMy4XruPewG0IxY7vkgU01X37FbG1LkoSQpLjS5ytqmrwwk45BNMEDudtdU0QwFbrC4xGhGGdKGgPSpFMlT7HKDv4xtTNoeifhC2oY85vaqIZNwX60xwojeqfXgN/poQIDAQAB",
  "browser_specific_settings": {
    "gecko": {
      "id": "qrcodegenerator@bhandari-santosh.com.np",
      "strict_min_version": "42.0"
    }
  },
  "short_name": "QR Code"
}