No, the software has a setting that allows you to toggle the browser so that its visible or not visible. In the video demonstration, I show the browser in visible mode so that you can see the actions being performed.
But it's also possible to minimize the software to the system tray, and you won't even notice that its running and working away while you do other things.
This will run on any Windows machine and requires .net 4.0 full version (free). If you would like to run this on a Mac then you will require Parallels or something equivalent.