Regardless of what browser is in use on the user's workstation, the terminal window inside the PSM session window shows "Mozilla Firefox"
This is the internal web browser installed on the DPA appliance. When a session is being hosted and/or recorded by the DPA appliance, Firefox will be used and is independent of the browser being used on by the session requestor.
This is part of the product design and there is no option to modify this configuration. It should have no impact on performance or compatibility.