Hi all, With IE, I can use the following code to Open a html file invisible and use IE to call execWB to print that file without any GUI poping up as well. The whole process looks so smoothly and professionally in term of user interaction with this method.  $oIE= _IECreate ("C:\Test\ShippingLabelV3.html",0,0) $oIE2.execWB(6,2) Would you have any suggestion that we can achieve the same goal with either Firefox or Chrome in WebDriver? Your feedback is much appreciated.