Firefly is an expert in the art of sabotage and specializes in explosive devices that disable electronic systems. He worked in covert ops on missions involving computer espionage and was brought onto the Sigma 6 Team to destroy a sophisticated computer virus created by COBRA to destabilize the world economy. He infiltrated the evil organization and blew up the base's central electronics core, stopping the virus from being transmitted and ending all computerized COBRA activity for over a year. He became a permanent member of the Sigma 6 Team to provide his expertise in fighting the COBRA B.A.T. troops. His innovative devices have provided the team with powerful weapons to deplete the ranks of these dangerous robots.
However, It seems that Firefly may actually be working as a spy for the COBRA Organization, the Sigma 6 Team just doesn't know it.