[🐛 Bug]: Python, Pytest - download.default_directory is not working when --headless=new

[petrisorionel]

What happened?

When we set the --headless=new argument for Chrome options and download.default_directory prefs, download is not working, file is not downloaded in default directory.

prefs = {"download.default_directory": os.path.join(ROOT_DIR, DYNAMIC_FILES_DIR),
                 "savefile.default_directory": os.path.join(ROOT_DIR, DYNAMIC_FILES_DIR),
                 "download.prompt_for_download": False,
                 "download.directory_upgrade": True}
        options.add_experimental_option("prefs", prefs)`

options.add_argument("--headless=new")`

How can we reproduce the issue?

Every basic test with --headless=new argument for Chrome options.

Relevant log output

-

Operating System

Windows 10, Debian 11

Selenium version

selenium==4.21.0

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

google-chrome-stable 125.0.6422.112-1

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

google-chrome-stable 125.0.6422.112-1

Are you using Selenium Grid?

no

[github-actions[bot]]

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

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Thank you!

[github-actions[bot]]

Hi, @petrisorionel. This issue has been determined to require fixes in ChromeDriver.

You can see if the feature is passing in the Web Platform Tests.

If it is something new, please create an issue with the ChromeDriver team. Feel free to comment the issues that you raise back in this issue. Thank you.

[petrisorionel]

@diemol can you explain why with "--headless=old" is working?

[diemol]

You can find more information here https://developer.chrome.com/docs/chromium/new-headless

This is out of the scope of Selenium, it is how Chrome behaves.