C#

Maximizing the window

driver.Manage().Window.Maximize();

This is fairly straightforward, ensures that our currently active window is maximized.

Position of the window

driver.Manage().Window.Position = new System.Drawing.Point(1, 1);

Here we essentially move the currently active window to a new position. In the Point object we provide x and y co-ordinates; these are then used as offsets from the top-left corner of the screen to determine where the window should be placed. Note that you can also store the window position in a variable:

System.Drawing.Point windowPosition = driver.Manage().Window.Position;

Size of the window

Setting and getting the window size uses the same syntax as the position:

driver.Manage().Window.Size = new System.Drawing.Size(100, 200);
System.Drawing.Size windowSize = driver.Manage().Window.Size;

URL of the window

We can obtain the current URL of the active window:

string url = driver.Url;

We can also set the URL for the active window, which will make the driver navigate to the new value:

driver.Url = "http://stackoverflow.com/";

Window handles

We can obtain the handle for the current window:

string handle = driver.CurrentWindowHandle;

And we can obtain the handles for all open windows:

IList<String> handles = driver.WindowHandles;

Python

Maximizing the window

driver.maximize_window()

Get position of the window

driver.get_window_position() # returns {'y', 'x'} coordinates

Set position of the window

driver.set_window_position(x, y) # pass 'x' and 'y' coordinates as arguments

Get size of the window

driver.get_window_size() # returns {'width', 'height'} values

Set size of the window

driver.set_window_size(width, height) # pass 'width' and 'height' values as arguments

Current page title

driver.title

Current URL

driver.current_url

Window handles

driver.current_window_handle

List of currently opened windows

driver.window_handles

Switch to the new opened tab. Close the current windows(In this case the new Tab). Switch back to first window.

PROTRACTOR:

browser.getAllWindowHandles().then(function (handles) {
    browser.driver.switchTo().window(handles[1]);
    browser.driver.close();
    browser.driver.switchTo().window(handles[0]);
});

JAVA Selenium:

        Set<String> handlesSet = driver.getWindowHandles();
        List<String> handlesList = new ArrayList<String>(handlesSet);
        driver.switchTo().window(handlesList.get(1));
        driver.close();
        driver.switchTo().window(handlesList.get(0));

Python

Most commonly used scenario:

1. open page in new window
2. switch to it
3. do something
4. close it
5. switch back to parent window

# Open "Google" page in parent window
driver.get("https://google.com")

driver.title # 'Google'

# Get parent window
parent_window = driver.current_window_handle 

# Open "Bing" page in child window
driver.execute_script("window.open('https://bing.com')") 

# Get list of all windows currently opened (parent + child)
all_windows = driver.window_handles 

# Get child window
child_window = [window for window in all_windows if window != parent_window][0] 

# Switch to child window
driver.switch_to.window(child_window) 

driver.title # 'Bing'

# Close child window
driver.close() 

# Switch back to parent window
driver.switch_to.window(parent_window) 

driver.title # 'Google'