[🐛 Bug]: Unable to hide DevTools listening on ws

[MohamedV0]

What happened?

I'm working on a Selenium script to automate browser tasks, and I've run into an issue regarding the DevTools message. When I use the --headless option, the following message keeps appearing in the console:

"DevTools listening on ws://127.0.0.1:51481/devtools/browser/505e7f66-fd69-494b-a733-0cce438dec53"

However, the message successfully disappears when I remove the --headless option.

How can we reproduce the issue?

from selenium import webdriver
options = webdriver.ChromeOptions()
options.add_experimental_option("excludeSwitches", ['enable-logging'])
options.add_argument("--log-level=3")
options.add_argument("start-maximized")
options.add_argument("--headless")
driver = webdriver.Chrome(options=options)
input("")

Relevant log output

DevTools listening on ws://127.0.0.1:51481/devtools/browser/505e7f66-fd69-494b-a733-0cce438dec53

Operating System

Windows 11

Selenium version

Python 3.11.4 selenium 4.15.1

What are the browser(s) and version(s) where you see this issue?

Chrome Version 119.0.6045.106 (Official Build) (64-bit)

What are the browser driver(s) and version(s) where you see this issue?

Chrome Version 119.0.6045.106 (Official Build) (64-bit)

Are you using Selenium Grid?

no

[github-actions]

@MohamedV0, thank you for creating this issue. We will troubleshoot it as soon as we can.

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Thank you!

[titusfortner]

--headless is going away. Try --headless=new

[MohamedV0]

--headless is going away. Try --headless=new

I tried this but same problem

[nvborisenko]

I think it is about that output from driver appears in user's console.

[titusfortner]

1. Theoretically same output should appear for headless=new & without headless
2. By default the driver output should be getting sent to dev/null
3. You should try to manage driver logging with the Service class instead of the options class — https://www.selenium.dev/documentation/webdriver/browsers/chrome/#log-output

[matheusdorigo]

My code has the same problem today, but i dont put any change

[matheusdorigo]

options = webdriver.EdgeOptions()
options.add_argument("--headless")
options.add_experimental_option('excludeSwitches', ['enable-logging'])

Configura o driver do Edge

driver = webdriver.Edge(service=Service(EdgeChromiumDriverManager().install()),options=options)

[titusfortner]

1. you no longer need to use EdgeChromiumDriverManager. If you make sure all drivers are deleted from your system, it will just work.
2. You do not need to excludeSwitches on enable-logging. Whether logs happen in stderr or to a file, should be managed by Service. https://source.chromium.org/chromium/chromium/src/+/main:chrome/test/chromedriver/chrome_launcher.cc;l=147

options = webdriver.EdgeOptions()
options.add_argument("--headless=new")
service = webdriver.EdgeService(log_output="/path/to/edgedriver.log")
driver = webdriver.Edge(options=options, service=service)

[matheusdorigo]

Hi there,

@titusfortner your reply dont work for me, the log still show up all errors and console output.

Add the exceptions worked for me:

options.add_argument('log-level=3')

I see the message DevTools listening on ws://127.0.0.1 but the rest of the logs, dont show to me, its great.

[TomKranenburg]

Same problem for me. I've tried every single thing on earth and I cannot get rid of the:

DevTools listening on ws://127.0.0.1:54805/devtools/browser/bc6af4eb-3a7c-4385-a820-cc932617e613

Message. Driving me crazy.

Only appears in headless mode. I'm using the Edge driver.

[titusfortner]

I can't duplicate this.

I have a devtools.py file with your original code:

from selenium import webdriver

options = webdriver.EdgeOptions()
options.add_experimental_option("excludeSwitches", ['enable-logging'])
options.add_argument("--log-level=3")
options.add_argument("--headless")
options.add_argument("start-maximized")
driver = webdriver.Edge(options=options)

driver.quit()

I run: python ./devtools.py and I do not see anything in the console.

[TomKranenburg]

I can't duplicate this.

I have a devtools.py file with your original code:

from selenium import webdriver

options = webdriver.EdgeOptions()
options.add_experimental_option("excludeSwitches", ['enable-logging'])
options.add_argument("--log-level=3")
options.add_argument("--headless")
options.add_argument("start-maximized")
driver = webdriver.Edge(options=options)

driver.quit()

I run: python ./devtools.py and I do not see anything in the console.

Running this code gives me the following output: