upgrade selenium standalone to 2.43.1-2.9.0
upgrade selenium standalone to 2.43.1-2.9.0

LewisW/docker-selenium-firefox-chrome-beta,marcellodesales/docker-headless-firefox,vvo/docker-selenium-firefox-chrome-beta,expa/docker-selenium-firefox-chrome-beta,cnelson/docker-selenium-firefox-chrome-beta