[py] don't use websocket-port if user sets connect-existing (a4dc6e)

Author: titusfortner

py/selenium/webdriver/firefox/service.py

@@ -19,7 +19,6 @@
 
 from selenium.webdriver.common import (service, utils)
 
-
 DEFAULT_EXECUTABLE_PATH = "geckodriver"
 
 
@@ -53,7 +52,8 @@ def __init__(self, executable_path: str = DEFAULT_EXECUTABLE_PATH,
             self, executable_path, port=port, log_file=log_file, env=env)
         self.service_args = service_args or []
         # Set a port for CDP
-        self.service_args.append("--websocket-port")
+        if '--connect-existing' not in service_args:
+            self.service_args.append("--websocket-port")
         self.service_args.append("%d" % utils.free_port())
         # Set the webdriver port
         self.service_args.append("--port")