Examine source code of Offline QR Maker

{
  "action": {},
  "background": {
    "scripts": [
      "service_worker.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{f1c5e811-b695-410f-8d45-8bd341eff565}",
      "strict_min_version": "130.0"
    }
  },
  "description": "An offline SVG QR code generator (from URLs, text selections, user input); no tracking, minimal permissions",
  "icons": {
    "128": "icon128.png"
  },
  "manifest_version": 3,
  "name": "Offline QR Maker",
  "permissions": [
    "activeTab",
    "scripting",
    "contextMenus"
  ],
  "version": "1.1.0",
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "dialog.html"
      ]
    }
  ]
}