selenium/standalone-chrome - Selenium standalone with chrome installed.
selenium/node-chrome - Grid node with Chrome installed, needs to be connected to a Grid Hub.
selenium/standalone-chrome-debug - Selenium standalone with Chrome installed, and runs VNC Server.
selenium/node-chrome-debug - Grid node with Chrome installed and VNC Server, needs to be connected to a Grid Hub.

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vns for selenium/standalone-chrome:
localhost:5900
pwd: secret

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Implicit wait time for findElements https://stackoverflow.com/a/28067495/1907888

https://github.com/php-webdriver/php-webdriver/wiki/

$driver->switchTo()->frame($my_frame);
// do your stuff here and switch back afterwards
$driver->switchTo()->defaultContent();

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Travian - global js obj