Firefox Windows Selenium Bug - CrossBrowserTesting.com

test.js

const Base64 = require('base64-js');
const fs = require('fs');
const {Builder, Capabilities} = require('selenium-webdriver'); // version 4.0.0-alpha.1

const CBT_USERNAME = process.env.CBT_USERNAME;
const CBT_AUTHKEY = process.env.CBT_AUTHKEY;
const SELENIUM_SERVER_URL = `http://${CBT_USERNAME}:${CBT_AUTHKEY}@hub.crossbrowsertesting.com:80/wd/hub`;

async function runAsync() {
  const builder = new Builder()
    .usingServer(SELENIUM_SERVER_URL)
    .withCapabilities(new Capabilities({
      'browserName': 'Firefox',
      'version': '60x64',
      'platform': 'Windows 10',
      'record_video': true,
      'record_network': true,
    }))
  ;

  console.log('Step 1 of 6 - Starting browser...');
  const driver = await builder.build();
  console.log('Step 2 of 6 - Done starting browser!');

  try {
    console.log('Step 3 of 6 - Navigating to URL...');
    await driver.get('https://www.google.com/search?q=flowers');
    console.log('Step 4 of 6 - Done navigating to URL!');

    console.log('Step 5 of 6 - Taking screenshot...');
    const base64Str = await driver.takeScreenshot();
    const pngBuffer = Buffer.from(Base64.toByteArray(base64Str));
    fs.writeFileSync('/tmp/screenshot.png', pngBuffer, {encoding: null});
    console.log('Step 6 of 6 - Done taking screenshot!');
    console.log('/tmp/screenshot.png');
  } finally {
    await driver.quit();
  }
}

runAsync();

test.log

Step 1 of 6 - Starting browser...
---> HANGS INDEFINITELY <---