Y'all see that domed glass piece of equipment in the aft canopy on the F-84? The F-86 had it, too. I saw one reference work describe that as a "light", presumably a rotating beacon. Now, putting the aircraft rotating beacon under the cockpit canopy would quite possibly be the worst idea ever devised. In reality that is the ARN-6 automatic direction finder antenna. In the F-80C it was under that upper black section of the nose, but it needed to be out where it could receive the radio signals and so they put it under the bubble canopy in the other aircraft. I think the cabin outflow valve is located in the rear canopy, also.