Window.maximize() fails on Firefox ESR v52.3.0

Question

I have a regression pack created in Selenium 2.45.0 that I recently upgraded to Selenium (seleniump-java 3.4.0 and selenium server 3.7.1). Currently I have Firefox ESR v52.3.0 on my system. After upgrading to selenium 3.4.0 window.maximize() is failing with below error -

org.openqa.selenium.WebDriverException: Failed to find width field

If i try to set the dimension by

driver.manage().window().setSize(new Dimension(1920, 1080));

it gives me following error -

org.openqa.selenium.WebDriverException: setWindowRect

I have set path to geckodriver and also set FirefoxProfile with following options,

profile.setPreference("browser.download.folderList", 2);
    profile.setPreference("browser.download.manager.showWhenStarting", false);
    profile.setPreference("browser.download.dir", System.getProperty("user.dir") + "\\downloads");
    profile.setPreference("browser.helperApps.neverAsk.openFile","text/csv,application/x-msexcel,application/excel,application/x-excel,"
            + "application/vnd.ms-excel,image/png,image/jpeg,text/html,text/plain,application/msword,application/xml");
    profile.setPreference("browser.helperApps.neverAsk.saveToDisk","text/csv,application/x-msexcel,"
            + "application/excel,application/x-excel,application/vnd.ms-excel,image/png,image/jpeg,text/html,text/plain,application/msword,application/xml");
    profile.setPreference("browser.helperApps.alwaysAsk.force", false);
    profile.setPreference("browser.download.manager.alertOnEXEOpen", false);
    profile.setPreference("browser.download.manager.focusWhenStarting", false);
    profile.setPreference("browser.download.manager.useWindow", false);
    profile.setPreference("browser.download.manager.showAlertOnComplete", false);
    profile.setPreference("browser.download.manager.closeWhenDone", false);
    profile.setPreference("browser.tabs.remote.autostart", false);
    profile.setPreference("browser.tabs.remote.autostart.1", false);
    profile.setPreference("browser.tabs.remote.autostart.2", false);
    profile.setPreference("browser.tabs.remote.force-enable", "false");

Please let me know how to maximize window on Firefox browser v52.3.0.

Many thanks

Possible duplicate of [driver.manage().window().maximize() issue with ChromeDriver 2.33](https://stackoverflow.com/questions/46802051/driver-manage-window-maximize-issue-with-chromedriver-2-33) — undetected Selenium, Feb 24 '18 at 14:53

score 0 · Answer 1 · answered Feb 24 '18 at 15:11

While working with Selenium 3.x releases the line of code to maximize the Browser Window is :

driver.manage().window().maximize();

As you mentioned of using Firefox ESR v52.3.0 possibly Firefox Browser variants does gets initialized with the Browser Window being maximized. Hence there should be no additional requirement to call driver.manage().window().maximize(); or driver.manage().window().setSize(new Dimension(1920, 1080));.

Web Browsers which are still OSS compliant e.g. Chrome , PhantomJS , etc a couple of them still doesn't opens being maximized. A couple of Chromium issues suggested to use ChromeOptions class to maximize the Web Browser as an alternative as follows :

ChromeOptions options = new ChromeOptions();
options.addArguments("test-type");
options.addArguments("start-maximized");
options.addArguments("disable-infobars");
options.addArguments("--disable-extensions"); 
WebDriver driver = new ChromeDriver(options);

Here you can find a couple of discussions on the same :

Window.maximize() fails on Firefox ESR v52.3.0

1 Answers1