* '''Console''': past, fitzgen, bgrins
* '''Debugger''': past, vporof, fitzgen, jimb, ejpbruel, jlongster
* '''Developer Toolbar''': jwalker, bgrins, mikeratcliffe
* '''Firefox OS Simulator''': ochameau, paul, jryans, janx
* '''Inspector''': pbrosset, bgrins, Optimizer, mikeratcliffe, paul
* '''Memory''': fitzgen, jimb, jsantell
* '''Network Monitor''': vporof, jsantell, past