Start-Process comes up as background process when trying to launch web browser

Part of a test automation step template, I use the command Start-Process ‘http://localhost’ followed by a subset of scripts that seem to be functioning fine. This command ‘should’ open http://localhost using the default web browser. It starts the process of IE as a background process where as I need a visible live window. In my research, I’m guessing it’s due to the service account used for the OD Tentacle service. I’ve changed that and still nothing. Help!?!