[1] Initially portrayed as a criminal who utilized lighting effects to commit robberies, Firefly was later reimagined as a sociopathic pyromaniac with an obsessive compulsion to start fires following Crisis on Infinite Earths' reboot of the DC Universe in the 1980s.

This darker depiction of the character has since endured as one of the superhero Batman's most recurring enemies and belongs to the collective of adversaries that make up his central rogues gallery.

Garfield Lynns was a down-and-out film special effects expert whose plan to rob a theater by faking a fire was foiled by Batman and Robin.

[5] In DC One Million, Firefly nearly burns down Gotham while infected with the Hourman virus, requiring Nightwing and Robin to work with the future Batman to stop him.

Firefly makes a short appearance in the Justice League of America story arc "Crisis of Conscience", fighting Catwoman in Gotham City over a diamond before Batman arrives.

A short time later, Firefly is broken out of Arkham Asylum by Dick Grayson, who has assumed the mantle of Batman, to assist him in gaining access to Sebastian Blackspell's closest friends.

Following Crisis on Infinite Earths' reboot of the DC Universe, Firefly's depiction was drastically altered from that of a mere criminal who utilized colored lights and optical illusions to that of a violent sociopath with intense pyromania.

This specialized outfit is equipped with an extensive arsenal of fire-creating weapons, including a military-grade flamethrower, various incendiary devices (such as grenades, napalm, and smoke bombs), and a sword-like blade of superheated plasma for close-ranged hand-to-hand combat.

Ted Carson is a former high school teacher who tries to incinerate everything that will separate him from his ex-girlfriend Cindy Cooke, though he is ultimately defeated by Nightwing and Batgirl.

[14] An alternate timeline variant of Firefly appears in the Flashpoint tie-in The Canterbury Cricket as a member of the Ambush Bugs who is killed in battle against the Amazons.