Facebook for iPhone, Firebug, iUI, and early Firefox Joe Hewitt is a software programmer who is best known for his work on the Firefox web browser and related software development tools like Firebug and DOM Inspector. Education[edit] His first project took place while still attending Hopatcong High School. Career[edit] Hewitt created the website Feff World with Douglas Palermo.[1] From 2000 to 200