[🐛 Bug]: Unable to allow third-party cookies in Chrome Incognito mode since version 139

[sergigr527]

Description

Hello all,

Since Chrome was updated to version 139, I have not been able to allow third-party cookies in Incognito mode.

I have tried several approaches to enable third-party cookies, but all of them have failed. Everything was working correctly up to and including version 138. Starting with version 139, none of the previous configurations work, and when I click on the lock icon next to the URL bar, the cookies setting shows as blocked.

At this point, I’m not sure whether this is a Selenium issue or a new Chrome feature/change.

Reproducible Code

public void InitDriver(ref IWebDriver driver, bool isMobile = false)
{
    var options = new ChromeOptions();

    // --- Browser mode ---
    options.AddArgument("--incognito");
    options.AddArgument("--start-maximized");
    options.AddArgument("--no-sandbox");
    options.AddArgument("--disable-dev-shm-usage");

    // --- Feature flags ---
    options.AddArgument("--disable-features=BlockInsecurePrivateNetworkRequests,ThirdPartyCookiesBlocking");
    options.AddArguments("--disable-search-engine-choice-screen");

    // --- Cookie & content preferences ---
    options.AddUserProfilePreference("profile.default_content_setting_values.cookies", 1);  // Allow cookies
    options.AddUserProfilePreference("profile.block_third_party_cookies", false);          // Allow 3rd party cookies
    options.AddUserProfilePreference("profile.cookie_controls_mode", 0);                   // Disable cookie controls

    // --- Download preferences ---
    options.AddUserProfilePreference("download.prompt_for_download", false);

    // --- Logging ---
    options.SetLoggingPreference(LogType.Browser, LogLevel.All);

    // --- Driver setup ---
    string version = new DriverManager().SetUpDriver(
        new ChromeConfig(),
        VersionResolveStrategy.MatchingBrowser
    );

    string driverPath = version.Substring(0, version.LastIndexOf(@"\"));
    driver = new ChromeDriver(driverPath, options);
}

---

ℹ️ Last known working version: 4.35

[selenium-ci]

@sergigr527, thank you for creating this issue. We will troubleshoot it as soon as we can.

Selenium Triage Team: remember to follow the Triage Guide

[diemol]

Could you please report this to the Chrome folks? Thank you.

[selenium-ci]

Hi, @sergigr527.
This issue has been determined to require fixes in ChromeDriver.

You can see if the feature is passing in the Web Platform Tests.

If it is something new, please create an issue with the ChromeDriver team.
Feel free to comment the issues that you raise back in this issue. Thank you.

[github-actions]

This issue has been automatically locked since there has not been any recent activity since it was closed. Please open a new issue for related bugs.