Top right hand corner of the browser there's a button which will show a number in it. Press that button and the tab switcher will come up, which you can use to close tabs.

 

Welcome to AF, Rotny52.
I have moved this thread to the S3 forum where the other S3 users can read and post to your thread, as well.

When you are in your browser, scroll to the top of the browser page, and on the right side top of the page it tells you how many windows are open. Click on the windows to see which windows you want to eliminate, then just X out the ones you choose to close.