Examine source code of QRat - QR Code Generator

{
  "manifest_version": 3,
  "name": "QRat - QR Code Generator",
  "version": "1.0.0",
  "description": "Make attractive QR codes in minutes",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "256": "icons/logo_256.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "icons": {
    "256": "icons/logo_256.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "qrat@ohhandy.com"
    }
  }
}