Seleniumbase Proxy Not Working in 2025

[msafiullahqadeer786-commits]

Michael, please reply. SeleniumBase proxy support is not working. I already informed you about this earlier, and you told me to activate CDP mode before opening the site. I have done that, but there is still no difference — the proxy authentication popup keeps appearing again and again.

I can provide my code as well. This is how I am currently using the proxy in SeleniumBase:

with SB(proxy=selenium_proxy, uc=True, incognito=False, uc_cdp=True) as sb:
url = "https://visa.vfsglobal.com/tur/en/fra/login"
sb.open(url)

I am using proxies in this format, for example:

82.23.45.244:6496:uprjf-statitial:zaemel13

Please fix this issue as it has become a serious problem. Developers are currently unable to use proxies properly because of this.

[mdmintz]

You never activated CDP Mode. That's done via sb.activate_cdp_mode(URL).
Auth proxies are set via this format:

• "USER:PASS@IP:PORT" OR
• "USER:PASS@SERVER:PORT";

The @ char should appear exactly once, separating the auth string from the server string.
The : char should appear exactly twice - once in the auth string, and once in the server string.

Full example:

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)
    breakpoint()

This is working in the latest version of SeleniumBase.
If you're using an older version, you should upgrade to the latest version.

[Hielobro]

Thank your for you patience, you are a saint. Could you please tell me, why sb gets stuck on getting page after setting cookies? It doesnt happend with old chrome version
url = "https://www.ozon.ru/my/main"
sb.activate_cdp_mode(url)
for bcookie in shared_cookies:
if bcookie["name"] in ["__Secure-access-token", "__Secure-refresh-token"]:
cookie = {
"name": bcookie["name"],
"value": bcookie["value"],
"domain": ".ozon.ru",
"path": "/",
"secure": True,
}
sb.driver.add_cookie(cookie)
print("added_cookies")
sb.refresh_page()
print("refreshed")
element = sb.wait_for_element('[data-widget="userAvatar"]', timeout=30)
print("found user avatar!")
it gets stuck on "added_cookies"

[mdmintz]

The reason CDP Mode is stealthy is because WebDriver is disabled when CDP Mode is activated. You cannot call WebDriver methods from CDP Mode unless you reconnect WebDriver (sb.reconnect()). Reconnecting WebDriver lets you use WebDriver methods again, but you'll lose your stealth.

[Hielobro]

Thanks for the reply, is there a way to stealthily add cookies?
Does wait_for_element make me lose stealth?

[mdmintz]

There's an async example for CDP Mode cookies here: https://github.com/seleniumbase/SeleniumBase/blob/master/examples/cdp_mode/raw_cookies_async.py
sb.wait_for_element is stealthy. See the bottom of https://github.com/seleniumbase/SeleniumBase/blob/master/examples/cdp_mode/ReadMe.md for available methods.

[Hielobro]

Thanks a lot for your time and patience, truly God's work.

[danruggi]

Hi! How are you?
This cdp_mode is new to me.

How to assert_element or highlight elements that are shadow rooted?
Checked in examples, but found just the cdp_click()

I wrote functions that do this in javascript

But the previous mode I was using:
sb.assert_element(".notebook-cell-list .cell:nth-of-type(3) colab-run-button::shadow button#run-button")

is not working anymore

[mdmintz]

Use PyAutoGUI to interact with Shadow-root elements in CDP Mode.
Methods already exist for clicking CAPTCHAs that are hidden within Shadow-root, such as Cloudflare Turnstiles.