What would an ammonium sulfide fire look like?
If your container is supposed to contain solid ammonium sulfide $\ce{(NH4)2S}$, it better be cooled to -20 °C or below. 

(Typically, ammonium sulfide is only used in aquous solution to precipitate metal cations of cobalt, nickel and others as their sulfides in the Kationentrennungsgang).

Long before the solid ammonium sulfide reaches room temperature, it will start to decompose and ammonia and hydrogen sulfide are liberated.