The California State Assembly has passed a bill that mandates 3D printer surveillance software to prevent the manufacture of firearms without a license. The Electronic Frontier Foundation (EFF) opposes the bill, arguing that it censors lawful speech, builds out corporate surveillance, and criminalizes open source experimentation. The bill has undergone amendments, but the EFF's core concerns remain unaddressed. The EFF is calling on the state senate to drop the bill and protect the rights of 3D printer users.