class ActionDispatch::SystemTesting::Browser

def preload

parallel tests.
update the webdriver once and avoid race conditions when using
proc to update web drivers. Running this proc early allows us to only
driver_path can be configured as a proc. The webdrivers gem uses this 
def preload
  case type
  when :chrome
    ::Selenium::WebDriver::Chrome::Service.driver_path&.call
  when :firefox
    ::Selenium::WebDriver::Firefox::Service.driver_path&.call
  end
end