Setting browser window size in Watir-webdriver

How can you specify the siz开发者_Python百科e of the browser window opened when you call the following with watir-webdriver?

browser = Watir::Browser.new(:firefox)

This works only for Firefox at the moment:

browser.window.resize_to(800, 600)

and you can move the browser, too:

browser.window.move_to(0, 0)

I'm using ruby+watir-webdriver and this code works for both FF and IE browsers (I have not checked in others browsers)

screen_width = browser.execute_script("return screen.width;")
screen_height = browser.execute_script("return screen.height;")
browser.driver.manage.window.resize_to(screen_width,screen_height)
browser.driver.manage.window.move_to(0,0)

I did something like this

browser = Watir::Browser.new :firefox, :profile => profile
browser.send_keys :f11