Selenium remoteWebDriver : connection to selenium-standalone-server fail (driver version unknown)
I had the same error yesterday :
Exception: The path to the chromedriver executable must be set by the webdriver.chrome.driver system property**
I solved it by adding the chromedriver.exe in the path of the node machine. (https://code.google.com/p/chromedriver/downloads/list) But it's weird to have this problem if try to launch firefox ...
npm install chromedriver
Had the same issue, that worked for me.