Examine source code of QR Code Generator

{
  "manifest_version": 2,
  "name": "QR Code Generator",
  "version": "1.0",
  "description": "Generate QR codes from text or clipboard with a customizable UI and save as PNG.",
  "icons": {
    "48": "favicon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "QR Code Generator"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "com.gifmakes.qrcodegenerator@8a634f32-1650-4181-a5cf-55c5779ec3ff",
      "strict_min_version": "109.0"
    }
  }
}