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I'm using the Python package Undetected Chromedriver as I need to be able to log into a Google account with the webdriver, and I want to pass the options {"credentials_enable_service": False, "profile.password_manager_enabled": False} to the driver so that it doesn't bring up the popup to save the password. I was trying to pass those options using:

import undetected_chromedriver.v2 as uc

uc_options = uc.ChromeOptions()
uc_options.add_argument("--start-maximized")
uc_options.add_experimental_option("prefs", {"credentials_enable_service": False, "profile.password_manager_enabled": False})

driver2 = uc.Chrome(options=uc_options)

The argument --start-maximized works perfectly fine, and if I run the code with just that it starts maximised as intended. However, when adding the experimental options and running the code it returns the error:

selenium.common.exceptions.InvalidArgumentException: Message: invalid argument: cannot parse capability: goog:chromeOptions
from invalid argument: unrecognized chrome option: prefs

So I thought that I would try to pass the arguments as Desired Capabilities instead, making the code:

import undetected_chromedriver.v2 as uc

uc_options = uc.ChromeOptions()
uc_options.add_argument("--start-maximized")
uc_options.add_experimental_option("prefs", {"credentials_enable_service": False, "profile.password_manager_enabled": False})
uc_caps = uc_options.to_capabilities()

driver2 = uc.Chrome(desired_capabilities=uc_caps)

While this code runs and doesn't generate any errors, it also doesn't do anything at all. The password popup still shows up, and the driver doesn't even start maximised, despite the fact that the latter part worked as an option.

So my question is: how do I correctly pass Desired Capabilities to the Undetected Chromedriver? Or, alternatively: how do I correctly pass the Experimental Options to the Undetected Chromedriver?

Foxes
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    Have you tried `'prefs', {'credentials_enable_service': False, 'profile': {'password_manager_enabled': False}` – Jeni May 18 '21 at 08:23
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    Why don't you simply click on the popup? – technophile_3 May 18 '21 at 12:42
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    You should be able to set window size in driver... (in Java it's something like: driver.manage().window().setPosition... setSize... etc...) – pcalkins May 18 '21 at 19:23
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    I think you should be setting it as an option. (You should be able to mix both options and capabilities btw... but set them separately.) You sure that values for those settings are bools? Many will have 0,1,2 instead. – pcalkins May 18 '21 at 19:36
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    @Jeni I just tried that, but unfortunately it gives invalid sytanx no matter which way I try. – Foxes May 18 '21 at 21:18
  • @pcalkins I have tried passing them as an option, but that results in the unrecognised chrome option error shown above. And every way I've seen from other posts of how to pass those arguments to the regular chromedriver uses that exact syntax, so I'm fairly certain they're bools. – Foxes May 18 '21 at 21:18
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    maybe try removing the start maximized option. I think your undetected chromedriver already sets that. (though it uses: add_argument("start-maximized")... for some reason) – pcalkins May 18 '21 at 21:58
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    I've also seen it mentioned before that add_experimental should only be used once. It's used in the undetected chromedriver before you use it. (I think it has something to do with the way it writes to preferences file? Or overrides it...) – pcalkins May 18 '21 at 22:29
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    the more I look at it, it seems like your code is right and the undectected chromedriver code is wrong. I think it's borking the preferences file. It's also very doubtful that any of this would bypass Google's detection. – pcalkins May 18 '21 at 22:36
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    @pcalkins Yeah, I don't think it's possible to pass those options to the Undetected Chromdriver unfortunately. What I ended up doing was having it go to the settings page and disable the option from there, which is a little bit of a hassle but at least it works. Thanks for the help anyway! – Foxes May 19 '21 at 22:08

3 Answers3

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Undetected Chromedriver start webdriver service and Chrome as a normal browser with arguments, and after attaches a webdriver. Probably experimental preferents cannot be used on already running instance.

As workaround you can use Undetected Chromedriver patcher to modify the chromedriver and then use the it. But you need to check if the chrome is steal not detectable for your website. There're additional settings done for headless browser, so if you need headless check the source code.

import undetected_chromedriver.v2 as uc
from selenium import webdriver

patcher = uc.Patcher()
patcher.auto()

options = webdriver.ChromeOptions()
options.add_argument("--start-maximized")
options.add_experimental_option(
    "prefs", {"credentials_enable_service": False, "profile.password_manager_enabled": False})

with webdriver.Chrome(options=options, executable_path=patcher.executable_path) as driver:
    driver.get("")
Sers
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    I just tried that but it still gives the `unrecognized chrome option: prefs` error as shown above, unfortunately. – Foxes May 22 '21 at 16:05
  • This just doesn't work for me. Chrome opens and them closes. – user Jul 01 '21 at 19:57
2

Try using Options() instead of ChromeOptions() with @Sers answer

from selenium.webdriver.chrome.options import Options
chrome_options = Options()
chrome_options.add_experimental_option(
"prefs", {"credentials_enable_service": False, "profile.password_manager_enabled": False})
huzefausama
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2

Earlier this year, there were changes made to fix this issue and allow preferences:

https://github.com/ultrafunkamsterdam/undetected-chromedriver/issues/524

See https://github.com/ultrafunkamsterdam/undetected-chromedriver/commit/487969811851be6bcf6e3c55c8fc0d471940c6c3 for the commit.

That made important updates to https://github.com/ultrafunkamsterdam/undetected-chromedriver/blob/master/undetected_chromedriver/options.py in order to handle preferences.

Upgrade to a newer version to fix your issue.

Michael Mintz
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