Examine source code of QR Wizard

{
  "manifest_version": 2,
  "name": "QR Code Generator",
  "version": "1.0",
  "description": "Generate QR code for the current URL or custom text.",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "qrWizard16.png",
      "48": "qrWizard48.png",
      "128": "qrWizard128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3bbead87-4304-4678-a29a-28d5213116b3}"
    }
  }
}