I’m implementing Selenium automation in an Azure Pipeline using a headless Chrome browser. My goal is to force the browser window to 1920x1200; however, despite multiple approaches, the window only scales to a much smaller size. I experimented with various configurations, yet the obtained dimensions remain inadequate. Below is an alternative code snippet that attempts to correctly establish the desired resolution:
ChromeOptions opts = new ChromeOptions();
opts.addArguments("--disable-gpu");
opts.addArguments("--incognito");
opts.addArguments("--headless");
opts.addArguments("--window-size=1920,1200");
String driverExecutable = ConfigManager.getInstance().fetchDriverPath() + "driver.exe";
System.setProperty("webdriver.chrome.driver", driverExecutable);
WebDriver myDriver = new ChromeDriver(opts);
Dimension targetSize = new Dimension(1920, 1200);
myDriver.manage().window().setSize(targetSize);
System.out.println("Chrome Version: " + ((RemoteWebDriver)myDriver).getCapabilities().getVersion());
System.out.println("Window dimensions: " + myDriver.manage().window().getSize());
return myDriver;
The output indicates an unexpected resolution, so any insights or alternative solutions would be appreciated.
I encountered a similar problem where the headless mode didn’t respect the window size passed through the command line. After a fair amount of troubleshooting, I realized that the Chrome headless mode can behave inconsistently in environments like Azure Pipelines. In my case, using a virtual display via xvfb resolved the issue by providing a consistent environment for the browser. I also found that relying solely on setting dimensions programmatically with myDriver.manage().window().setSize does not always work in headless mode, so starting with the right environment setup is crucial.
hey, have u tried the ‘–force-device-scale-factor=1’ flag? i found its fixed my resolution issues in azure pipeline’s headless mode. sometimes the default enviornment ignores your settings, so tweaking chrome options may help.
My experience with similar issues led me to use a custom Docker container that mimics a full desktop environment instead of relying solely on headless mode in Azure Pipelines. I observed that Chrome sometimes ignores settings when launched in headless mode due to internal scaling factors. In my setup, I preconfigured the container’s virtual display settings and made sure that the ChromeDriver version exactly matched the browser version. This method allowed me to achieve consistent dimensions as desired by providing a more stable environment for the browser.
In my experience, the headless Chrome environment in Azure Pipelines can be quite finicky when it comes to handling resolution settings. I discovered that a more robust method involves running the tests inside a container where I could predefine the display parameters. In particular, configuring the environment to simulate a specific display mode before launching Chrome made the differences more predictable. Ensuring that the underlying system mimics a standard desktop environment has consistently led to the expected window dimensions in my projects.