I'm also thinking that the Navy would not use the Fuze Extenders because of the G-forces on the bombs when the plane is launched from a catapult. The Air Force would not have that problem. Here are couple of photos of Air Force Phantoms with "Daisy Cutter" fuze extenders.
The Daisy Cutters were also used on the 15,000 Lb. BLU-82 which was dropped by Skycrane helicopters and C-130 Aircraft, and the MOAB bomb used two of the fuze extenders.