Permission issue while accessing USB device on Web

// Automatic FlutterFlow imports
import '/backend/backend.dart';
import '/backend/schema/structs/index.dart';
import '/backend/schema/enums/enums.dart';
import '/flutter_flow/flutter_flow_theme.dart';
import '/flutter_flow/flutter_flow_util.dart';
import '/custom_code/widgets/index.dart'; // Imports other custom widgets
import '/custom_code/actions/index.dart'; // Imports custom actions
import '/flutter_flow/custom_functions.dart'; // Imports custom functions
import 'package:flutter/material.dart';
// Begin custom widget code
// DO NOT REMOVE OR MODIFY THE CODE ABOVE!

import 'package:usb_thermal_printer_web/usb_thermal_printer_web.dart';
import 'package:usb_device/usb_device.dart';

class OrderReceiptPrint extends StatefulWidget {
  const OrderReceiptPrint({
    super.key,
    this.width,
    this.height,
  });

  final double? width;
  final double? height;

  @override
  State<OrderReceiptPrint> createState() => _OrderReceiptPrintState();
}

class _OrderReceiptPrintState extends State<OrderReceiptPrint> {
  printReceipt() async {
    WebThermalPrinter _printer = WebThermalPrinter();

    //Pairing Device is required.
    await _printer.pairDevice(vendorId: 0x4070, productId: 0x33054);

    await _printer.printText('DKT Mart', bold: true, centerAlign: true);
    await _printer.printEmptyLine();

    await _printer.printRow("Products", "Sale");
    await _printer.printEmptyLine();

    for (int i = 0; i < 10; i++) {
      await _printer.printRow(
          'A big title very big title ${i + 1}', '${(i + 1) * 510}.00 AED');
      await _printer.printEmptyLine();
    }
    await _printer.printEmptyLine();
    await _printer.closePrinter();
  }

  @override
  Widget build(BuildContext context) {
    return Column(children: [
      ElevatedButton(
        onPressed: () {
          // startScan();
          printReceipt();
        },
        child: const Text('Test Print'),
      ),
    ]);
  }
}