[🐛 Bug]: Chrome Driver 133.0.6943.126: Chrome's resolution is scaled by a factor of 2

[gamegrobla]

Description

I am running selenium UI tests on the lates chrome driver version (133.0.6943.126) as a Docker SeleniumGrid container using TestContainers.

This is how I configure and spawn the container:

new WebDriverBuilder()
            .WithName(webDriverName)
            .WithBrowser(WebDriverBrowser.Chrome)
            .WithImage("selenium/standalone-chrome:133.0")
            .WithEnvironment("SCREEN_WIDTH", "1920")
            .WithEnvironment("SCREEN_HEIGHT", "1080")
            .WithEnvironment("SCREEN_DPI", "72")
            .Build();

those environment variable settings proposed by Gemini don't work

here are my my chrome flags:

        options.AddArgument("--start-maximized");
        options.AddArgument("--force-device-scale-factor=1");
        options.AddArgument("--high-dpi-support=1");
        options.AddArgument("--headless=new"); 
        options.AddArgument("--window-size=1920,1080"); 
        options.AddArgument("--ozone-override-screen-size=1920,1080"); 

the problem started occuring after switching from Chrome Driver 126 (or something around it) to 133 (as mentioned before)

setting the resolution to 1080p results in a resolution of 4k (screenshots of such resolution are taken and tests that contain checking scroll-behaviour fail because there is nothing to scroll - content is displayed in the viewport at once)

currently I set the resolution to 540p to achieve 1080p - but it is a temporary solution

Reproducible Code

new WebDriverBuilder()
            .WithName(webDriverName)
            .WithBrowser(WebDriverBrowser.Chrome)
            .WithImage("selenium/standalone-chrome:133.0")
            .WithEnvironment("SCREEN_WIDTH", "1920")
            .WithEnvironment("SCREEN_HEIGHT", "1080")
            .WithEnvironment("SCREEN_DPI", "72")
            .Build();

        options.AddArgument("--start-maximized");
        options.AddArgument("--force-device-scale-factor=1");
        options.AddArgument("--high-dpi-support=1");
        options.AddArgument("--headless=new"); 
        options.AddArgument("--window-size=1920,1080"); 
        options.AddArgument("--ozone-override-screen-size=1920,1080");

[selenium-ci]

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

Selenium Triage Team: remember to follow the Triage Guide

[github-actions]

⚠️ You reported using Selenium version 4.29.0, but the latest release is 4.32.

Please verify that this issue still occurs with the latest version. If it no longer applies, you can close this issue or update your comment.

This issue will be marked "awaiting answer" and may be closed automatically if no response is received.

[gamegrobla]

Using 4.32 version does not resolve the issue

[selenium-ci]

@gamegrobla, 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]

@gamegrobla the env variables should be prefixed with SE_, see the docs.

[gamegrobla]

thank you for the answer, but changing those env vars doesn't fix the issue.

for now I've discovered 2 ways to mitigate this issue:

• dividing the width and heigth / 2
• setting "--force-device-scale-factor" flag to 0.25 instead of 1

[diemol]

What happens when you try this on Firefox?