switchtowindow无法在Firefox和IE selenium webdriver 3.4.0中运行

Question

以下代码在Chrome中正常运行但在Firefox和IE中无效

public static Object[] switchToAnotherWindow()
{
    Set<String> windows=SeleniumMethods.getDriver().getWindowHandles();
    Object[] window=windows.toArray();  
    SeleniumMethods.getDriver().switchTo().window((String) window[(windows.size()-1)]);
    System.out.println("windows"+windows.toString());
    System.out.println("switched to Another window"+(windows.size()-1));
    SeleniumMethods.getLogger().log(LogStatus.INFO, "Switcing to Last Opened/Another window");
    return window;
}

public static void switchtoRequiredWindow(Object[] windows,int window)
{
    SeleniumMethods.getDriver().switchTo().window((String) windows[window]);
    System.out.println("windows"+windows[window]);
    System.out.println("switched to Original window"+window);
    SeleniumMethods.getLogger().log(LogStatus.INFO, "Switching to Required window"+window);
}

当我调用像public static void switchtoRequiredWindow(0)这样的方法时，它没有切换到原始窗口。你能建议我在Firefox和IE中工作吗？