[🐛 Bug]: firefox Options raises ResourceWarning

[graingert]

What happened?

Exception ignored in: <_io.FileIO name='/dev/null' mode='wb' closefd=True>

How can we reproduce the issue?

python -W error
Python 3.11.7+ (main, Dec  7 2023, 08:51:17) [GCC 11.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from selenium.webdriver.firefox.options import Options
>>> o = Options()
>>> o.binary = "firefox"
>>> del o
Exception ignored in: <_io.FileIO name='/dev/null' mode='wb' closefd=True>
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ResourceWarning: unclosed file <_io.BufferedWriter name='/dev/null'>

### Relevant log output

```shell
N/A

Operating System

Ubuntu

Selenium version

selenium==4.16.0 python

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

Firefox

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

GeckDriver

Are you using Selenium Grid?

No response

[github-actions]

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

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Thank you!

[graingert]

I tracked it down to this location:

selenium/py/selenium/webdriver/firefox/firefox_binary.py

Line 44 in 29b6dc7

self._log_file = log_file or open(os.devnull, "wb")

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.