I am trying to use Selenium to connect to existing instance of Firefox - the documentation says to use something like this
options=webdriver.FirefoxOptions()
options.binary_location = r'C:\Program Files\Mozilla Firefox\firefox.exe'
webdriver_service = Service(r'c:\tmp\geckodriver.exe')
driver = webdriver.Firefox(service = webdriver_service, service_args=['--marionette-port', '2828', '--connect-existing'])
However, I get the error
driver = webdriver.Firefox(service = webdriver_service, service_args=['--marionette-port', '2828', '--connect-existing'])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: WebDriver.__init__() got an unexpected keyword argument 'service_args'
I see other questions about "unexpected keyword argument", they say latest versions of Selenium has other ways of passing arguments through Options.
I tried
options.add_argument('--marionette-port')
options.add_argument('2828')
options.add_argument('--connect-existing')
But it still seems to create a new instance of Firefox
I have started firefox with the following arguments
"C:\Program Files\Mozilla Firefox\firefox.exe" -marionette -start-debugger-server 2828
How do I fix this?
These are my versions
Python version
python --version
Python 3.12.2
Selenium version
pip show selenium
Name: selenium
Version: 4.18.1
Geckodriver version
geckodriver --version
geckodriver 0.34.0 (c44f0d09630a 2024-01-02 15:36 +0000)
Firefox 123.0 (64-bit)
Windows 11
You should put the service_args parameter in the Service class and not on Firefox. I believe this should work
options=webdriver.FirefoxOptions()
options.binary_location = r'C:\Program Files\Mozilla Firefox\firefox.exe'
webdriver_service = Service(r'c:\tmp\geckodriver.exe', service_args=['--marionette-port', '2828', '--connect-existing'])
driver = webdriver.Firefox(service = webdriver_service)