In this paper, a generalized function projective combination-combination synchronization scheme (GFPCCS) among four chaotic systems is investigated via the active backstepping technique. To validate the proposed GFPCCS, suitable controllers are designed via the active backstepping technique to achieve GFPCCS among four chaotic Josephson junctions evolving from different initial conditions. The numerical simulations carried out show the achievement and effectiveness of the GFPCCS for the four chaotic Josephson junctions via the active backstepping technique. The results show that different types of synchronization can be achieved from the GFPCCS based on the choice of the scaling parameters, hence the GFPCCS could be used to modify the behaviour of coupled systems.