It is true that hydrogen [which makes up almost all of the Jovian atmosphere] is an explosive gas, and it also needs oxygen to burn. But the key point lies in this question: What is burning? read more
But Jupiter is about 90% hydrogen, 10% helium and everything else is less than 1%, so the amount of oxygen available for fire is less than 1%, and the total change in Jupiter’s composition would be less than 1%. read more
If a fire, substantially active is found, and that'sppossible because contrary to modern opiinion, the White House has caught and been destroyed by fire before, this would add what in DCFD parlance is called a WFD=Working Fire Dispatch garners a 6th engine, working with a 3rd truck as the Rapid Intervention Team, and responsible for firefighter rescue, you also get the Deputy Chief of Operations, another Battalion Chief, a Safety Officer, Fire Investigator, and another Medic and Ambulance. read more