pip --no-cache-dir install -U selenium

TASKKILL  /IM chrome.exe /f
TASKKILL  /IM iexplore.exe /f
TASKKILL  /IM firefox.exe /f
TASKKILL  /IM IEDriverServer.exe /f
TASKKILL  /IM geckodriver.exe /f
TASKKILL  /IM chromedriver.exe /f

java -jar selenium-server-standalone-3.141.59.jar

java -jar selenium-server-standalone-3.141.59.jar -role hub -port 4444

java -jar selenium-server-standalone-3.141.59.jar -role node -hub http://127.0.0.1:4444/grid/register

java -jar selenium-server-standalone-3.141.59.jar -role node -maxSession 5 -hub http://127.0.0.1:4444/grid/register

java -jar selenium-server-standalone-3.141.59.jar -role node -hub http://127.0.0.1:4444/grid/register  -maxSession 100 -browser "browserName=htmlunit,javascriptEnabled=true,version=firefox,maxInstances=100"

java -jar selenium-server-standalone-3.141.59.jar -maxSession 100 -role node -hub http://127.0.0.1:4444/grid/register -browser "browserName=chrome,maxInstances=100"

java -jar selenium-server-standalone-3.141.59.jar -maxSession 10 -role node -hub http://127.0.0.1:4444/grid/register -browser browserName=chrome,maxInstances=10 -browser browserName=firefox,maxInstances=10 -browser browserName="internet explorer",maxInstances=5