'Firehair' first appeared in Rangers Comics #21 (Fiction-House) February 1945. She appeared in every issue up to issue #65 (May 1952). She also appeared in eleven issues of her own quarterly title from 1948 to 1952
She is first seen travelling with her Bostonian father, who is killed in Texas by outlaws disguised as Red Indians. Left for dead, she is found by a member of the real Indian tribe. They nurse her back to health, but discover she has lost her memory. Raised by the tribe, she masters many of their native skills and is soon better than anyone else around.
'Firehair' is very strong and athletic and is a fierce and capable hand to hand fighter, often beating male opponents. She is also an accomplished horse rider and quickly tamed a wild stallion, which she named 'Devil's Eye'. She is also skilled at using a knife, bow and arrow and a revolver.
'Firehair' eventually regains her memory where she discovers her real name is Lynn Cabot and travels back to Boston to claim her inheritance, but soon discovers she prefers life in the West and returns to continue fighting outlaws.