def _start_process(self, path: str) -> None:
    """Creates a subprocess by executing the command provided.

    :param cmd: full command to execute
    """
    cmd = [path]
    cmd.extend(self.command_line_args())
    close_file_descriptors = self.popen_kw.pop("close_fds", sys.platform != "win32")
    try:
        start_info = None
        if sys.platform == "win32":
            start_info = subprocess.STARTUPINFO()
            start_info.dwFlags = subprocess.CREATE_NEW_CONSOLE | subprocess.STARTF_USESHOWWINDOW
            start_info.wShowWindow = subprocess.SW_HIDE

system = sys.platform
if system == "darwin":
    system = "mac"

# Class variables for headers

if sys.platform == "win32":
    return "Windows"
elif sys.platform == "darwin":
    return "Darwin"
elif sys.platform.startswith("linux"):
    return "Linux"
else:
    return sys.platform.title()

# In py/conftest.py
class Driver:
    @property
    def exe_platform(self):
        if sys.platform == "win32":
            return "Windows"
        elif sys.platform == "darwin":
            return "Darwin"
        # ...

# In py/selenium/webdriver/remote/remote_connection.py
class RemoteConnection:
    system = sys.platform
    if system == "darwin":
        system = "mac"
    user_agent = f"selenium/{__version__} (python {system})"

# In py/selenium/webdriver/firefox/firefox_binary.py
class FirefoxBinary:
    def __init__(...):
        self.platform = sys.platform

# In a new shared utility file, e.g., selenium/webdriver/common/platform.py
import sys

def get_canonical_platform() -> str:
    if sys.platform == "win32":
        return "windows"
    if sys.platform == "darwin":
        return "mac"
    if sys.platform.startswith("linux"):
        return "linux"
    return sys.platform

# In py/conftest.py
# ...
class Driver:
    @property
    def exe_platform(self):
        # Logic to convert canonical name to required format
        # e.g. get_canonical_platform().title()

# In py/selenium/webdriver/remote/remote_connection.py & firefox_binary.py
# ...
self.platform = get_canonical_platform()

def exe_platform(self):
    if sys.platform == "win32":
        return "Windows"
    elif sys.platform == "darwin":
        return "Darwin"
    elif sys.platform.startswith("linux"):
        return "Linux"
    else:
        return sys.platform.title()

self.platform = sys.platform
if not self._start_cmd:

close_file_descriptors = self.popen_kw.pop("close_fds", sys.platform != "win32")
try:
    start_info = None
    if sys.platform == "win32":
        start_info = subprocess.STARTUPINFO()
        start_info.dwFlags = subprocess.CREATE_NEW_CONSOLE | subprocess.STARTF_USESHOWWINDOW
        start_info.wShowWindow = subprocess.SW_HIDE

# In conftest.py
class Driver:
    @property
    def exe_platform(self):
        if sys.platform == "win32":
            return "Windows"
        elif sys.platform == "darwin":
            return "Darwin"
        # ... and so on

# In selenium/webdriver/firefox/firefox_binary.py
class FirefoxBinary:
    def __init__(self, ...):
        self.platform = sys.platform # This will be "win32" on Windows

    def _get_firefox_start_cmd(self):
        ...
        elif self.platform == "windows": # This check now fails on Windows
            # ... windows-specific logic

# In a new utility file, e.g., selenium/webdriver/common/platform.py
def get_platform_name():
    if sys.platform.startswith("win"):
        return "windows"
    if sys.platform == "darwin":
        return "darwin"
    # ... and so on

# In conftest.py
from selenium.webdriver.common.platform import get_platform_name
class Driver:
    @property
    def exe_platform(self):
        return get_platform_name().title()

# In selenium/webdriver/firefox/firefox_binary.py
from selenium.webdriver.common.platform import get_platform_name
class FirefoxBinary:
    def __init__(self, ...):
        self.platform = get_platform_name() # This will be "windows"

    def _get_firefox_start_cmd(self):
        ...
        elif self.platform == "windows": # This check now works
            # ... windows-specific logic