The Firefly is a community-created promotional cosmetic item for the Pyro. It replaces the Pyro's gas mask with the mask worn by Firefly in Batman: Arkham Knight; an industrial-looking insect-themed mask, with various tubes connecting it to the Pyro's suit.
The Firefly was contributed to the Steam Workshop.
- The Firefly was added to the game.
- Updated the Batman: Arkham Knight promo items so they can be traded.