1. florida has a move over law, meaning that you don't play chicken with the emergency vehicles stopped on the side of the road. You move to a lane away from the scene and failing that you reduce your speed to 20mph under the limit.
FHP - 'Move over' law gets serious
2. you are supposed to move to the right and yield the right of way to emergency vehicles (or any overtaking vehicle). Passing on the right is illegal and arguably dangerous, as is passing in the emergency lane. There is usually crud or completely stopped vehicles or pedestrians in the emergency lane.
http://www.flhsmv.gov/ddl/utc/APPENDIX_C.pdf
3. driving in the left lane when there's hardly any other cars?!? And 5 other lanes?!? The left lanes are for overtaking vehicles. Slower traffic to the right. You don't know the extent of the emergency, could be a heart attack, get the hell out of the way.