[Python] Python-Selenium Remote Connection to Dockerized Selenium Server

I'm trying to connect to a Dockerized version of Selenium on the same host within one Python script. This is running on a server, so this is necessarily headless.

I'd like to use the Firefox driver. The Docker container seems to be created and runs fine, however I keep getting "the connection reset by peer error".

My Python script is as follows:

import docker
from selenium import webdriver

client = docker.from_env()

client.images.pull("selenium/standalone-firefox:135.0.1-geckodriver-0.36.0-20250303")

firefox = client.containers.run("selenium/standalone-firefox:135.0.1-geckodriver-0.36.0-20250303",
detach = True,
name = "firefox",
ports = {4444: 4444, 7900: 7900},
shm_size = "2G",
environment = ["SE_START_XVFB=false",
"SE_SCREEN_WIDTH=1200",
"SE_SCREEN_HEIGHT=900"])

print(client.containers.list()) # this shows me the container, also I see it in `docker ps`

try:

driver = webdriver.Remote(
command_executor="http://127.0.0.1:4444/wd/hub",
options=webdriver.FirefoxOptions()
)

driver.get("http://www.python.org")

except Exception as e:

print("An exception occurred: ", e)



This raises the exception:

An exception occurred: ('Connection aborted.', ConnectionResetError(104, 'Connection reset by peer'))
​

How do I resolve this?

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