FIREBUG
Meaning of FIREBUG in English
fire ‧ bug /ˈfaɪəbʌɡ $ ˈfaɪr-/ BrE AmE noun [countable] informal
someone who deliberately starts fires to destroy property SYN arsonist
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012