A firebug is an arsonist or pyromaniac.
Firebug may also refer to:
Science and technology Pyrrhocoris apterus, commonly referred as the firebug, an insect of the family Pyrrhocoridae Firebug (software), a web development tool
Entertainment Firebug (comics), the name of three DC Comics supervillains Firebug (video game), a 1982 computer game for the Apple II computer Firebugs (video game), a 2002 game for the PlayStation The Fire Raisers (play), 1953 German play by Max Frisch also known in English as The Firebugs
Other uses "The Firebug", nickname of Bill Newton (1919–1943), Australian bomber pilot and posthumous recipient of the Victoria Cross Firebug (dinghy), a class of sailing dinghy