Festivalen blev planlagt fra 20 jun til 23 jun 2019 (3 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
Post Malone, Yungblud, Travis Scott, Tyler, the Creator, Lauren Daigle, Alec Benjamin, AJR, Kygo, Panic! at the Disco, Death Cab for Cutie, Nora en Pure, Louis The Child, Young the Giant, DJ Snake, SOJA.
De mest populære genrer og undergenrer i den foregående udgave var:
electronic
pop
hip hop
indie pop
indie rock
alternative rock
indie
alternative
electronica
dance
electropop
house
lo-fi
deep house
dream pop
electro
trap
chillout
downtempo