With Dylan Marron, Firestone wrote, performed in, and directed Ridgefield Middle School Talent Nite, which received a Capital Fringe Festival Director's Award in 2010.
Jo and her father Fred Firestone created the game Punderdome: A Card Game for Pun Lovers (published by Random House subsidiary Clarkson Potter, 2016).
Firestone has performed stand-up comedy on Comedy Central, at the UCB Theater in Manhattan, and around New York City. About stand-up gigs in "cellar clubs," Firestone explained, "Doing comedy in New York, I’ve been conditioned to thrive in basements. I’m not ready to do a comedy show until I go down a FLIGHT of stairs."
