Festivalen blev planlagt fra 20 jul til 22 jul 2012 (2 dag(e)).
Firefly Music Festival finder sted i Dover, United Kingdom. Her er den fulde adresse på festivalen: The Woodlands of Dover International Speedway, Dover
Imagine Dragons, The Killers, The Black Keys, Death Cab for Cutie, John Legend.
De mest populære genrer og undergenrer i den foregående udgave var:
rock
pop
electronic
indie rock
alternative rock
indie
indie pop
alternative
indie folk
blues rock
electropop
experimental
pop rock
electronica
folk rock
garage rock
synth-pop
americana
dance