How to handle proxies authentication pop-up using seleniumbase

Question

I'm trying to use an authenticated proxy with seleniumbase (I'm using python) while running the browser in undetected Chrome (uc=True). However, despite trying multiple approaches, I'm unable to get the proxy authentication to work correctly. The prompt just keep comming up very time.

Here is my current setup:

chrome_options = {
    "headless": False,
    "uc": True,
    "incognito": True
}
chrome_options["proxy"] = f"{username}:{password}@{ip}:{port}"


# Initialize the driver with authenticated proxy
driver = Driver(**chrome_options)

try:
    # Open the target website
    driver.get("https://ipinfo.io/json")
    print("Current IP info:", driver.page_source)
    sleep(10)
finally:
    # Quit the driver
    driver.quit()

✅ What I’ve Tried So Far:

Passing the proxy with credentials directly in the "proxy" key as shown above — doesn’t seem to be picked up properly.
I tried to use this package from python https://pypi.org/project/selenium-authenticated-proxy/ but it doesn't work either
I'ved tried this method of creating a new extension running in the background

manifest_json = """
{
    "version": "1.0.0",
    "manifest_version": 2,
    "name": "Chrome Proxy",
    "permissions": [
        "proxy",
        "tabs",
        "unlimitedStorage",
        "storage",
        "<all_urls>",
        "webRequest",
        "webRequestBlocking"
    ],
    "background": {
        "scripts": ["background.js"]
    },
    "minimum_chrome_version":"22.0.0"
}
"""
 
background_js = """
var config = {
        mode: "fixed_servers",
        rules: {
          singleProxy: {
            scheme: "http",
            host: "%s",
            port: parseInt(%s)
          },
          bypassList: ["localhost"]
        }
      };
 
chrome.proxy.settings.set({value: config, scope: "regular"}, function() {});
 
function callbackFn(details) {
    return {
        authCredentials: {
            username: "%s",
            password: "%s"
        }
    };
}
 
chrome.webRequest.onAuthRequired.addListener(
            callbackFn,
            {urls: ["<all_urls>"]},
            ['blocking']
);
""" % (PROXY_HOST, PROXY_PORT, PROXY_USER, PROXY_PASS)
 
 
def get_chromedriver(use_proxy=False, user_agent=None):
    path = os.path.dirname(os.path.abspath(__file__))
    chrome_options = webdriver.ChromeOptions()
    if use_proxy:
        pluginfile = 'proxy_auth_plugin.zip'
 
        with zipfile.ZipFile(pluginfile, 'w') as zp:
            zp.writestr("manifest.json", manifest_json)
            zp.writestr("background.js", background_js)
        chrome_options.add_extension(pluginfile)
    if user_agent:
        chrome_options.add_argument('--user-agent=%s' % user_agent)
    driver = webdriver.Chrome(
        os.path.join(path, 'chromedriver'),
        chrome_options=chrome_options)
    return driver

👉🏻 Doesn't work 🥲

4. I'ved search all the solution on github but nothing seem to work stably

I need some help 🥲

I am also having the same problem. I have updated seleniumbase but still unable to login proxy. Has anyone ever solved this problem? I need your help — Điệp Vũ
– Điệp Vũ, Commented Nov 6 at 10:28

JAEYEON SA · Accepted Answer · 2025-06-18 03:00:08Z

1

Though it's a bit late, I'm leaving this reply because I experienced the exact same issue as you.
I tried many different approaches, but in the end, upgrading SeleniumBase resolved everything.
That's all.

answered Jun 18 at 3:00

JAEYEON SA

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1 Comment

Community Jun 18 at 4:48

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Michael Mintz · Accepted Answer · 2025-11-07 17:47:28Z

0

If you're using SeleniumBase UC Mode with Chrome 142 or newer, proxy auth is set after CDP Mode is activated:

from seleniumbase import SB

with SB(uc=True, proxy="user:pass@ip:port") as sb:
    url = "https://api.ipify.org"
    sb.activate_cdp_mode(url)
    print("Full IP from ipify:")
    print(sb.get_page_source())

Before Chrome 142, proxy auth could be set via Chrome extension, but Chrome 142 completely removed the --load-extension option, (and the workaround, which was --disable-features=DisableLoadExtensionCommandLineSwitch), so now, the auth is set via CDP, which happens when SeleniumBase CDP Mode is activated.

answered Nov 7 at 17:47

Michael Mintz

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