Examine source code of QR Region Scanner

{
  "manifest_version": 2,
  "name": "QR Region Scanner",
  "version": "0.2.0",
  "description": "Select a region on the page, scan a QR code in it, and open its URL.",
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "permissions": [
    "activeTab",
    "notifications",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Scan QR region",
    "default_icon": {
      "16": "icons/icon.svg",
      "48": "icons/icon.svg"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "commands": {
    "scan-qr": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      },
      "description": "Scan a QR code in a selected region"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "qr-region-scanner@local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}