Short answers, pulled from the story.
Fritz Leiber was born on the 24th of December 1910 into a family of professional Shakespearean actors. His parents Fritz Leiber Sr. and Virginia Bronson Leiber toured the country with their own company Fritz Leiber & Co.
Fritz Leiber created the characters Fafhrd and the Gray Mouser who first appeared in Two Sought Adventure published in the August 1939 edition of Unknown. He is credited with naming the sword and sorcery subgenre and his work influenced other authors including Joanna Russ.
Fritz Leiber accepted a position with Douglas Aircraft primarily working on the C-47 Skytrain despite his long-held pacifist convictions. He balanced his wartime duties with his literary career and published fiction throughout the conflict.
The death of Leiber's first wife Jonquil in 1969 precipitated a permanent relocation to San Francisco and exacerbated his longstanding alcoholism. He struggled with substance abuse including comorbid barbiturate abuse which led to periods of penury in the 1970s.
Fritz Leiber died in 1992 a few weeks after a physical collapse while traveling from a science fiction convention in London Ontario. The cause of death was a stroke.