W3C protocol was forced to be disabled when using Chrome (#640).

But now we can remove this and let the handshake added in #560 to determine the proper protocol to use. So starting to next release of php-webdriver (1.8.0), W3C protocol will be used be default when used with Chromedriver 75+ (and also with Firefox+Geckodriver).

In case of troubles this could be still disabled using capabilities (as we do in on travis build):

$chromeOptions = new ChromeOptions();
$chromeOptions->setExperimentalOption('w3c', false);

$capabilities = DesiredCapabilities::chrome();
$capabilities->setCapability(ChromeOptions::CAPABILITY, $chromeOptions);

$driver = RemoteWebDriver::create($hostUrl, $capabilities);