Netsurf browser duplicates itself in my dock when it starts

I have three (3) web browsers in my stock dock that came with my Operating System (OS). For some reason when I start Netsurf 2.8 it shows a 2nd time in the dock. No other application behaves like this. I just open the other applications in the dock and none duplicates the same way Netsurf does. Is there a means I can change that?
