To dream of a fireworks represents a spectacle of success, talent, or creativity. Noticing how wonderful or incredible an achievement is. All your work has come together perfectly. Showing off how well something is working. Chemistry in relationships matching perfectly. Sexual climax. A spectacular moment.
Example: A young girl dreamed of fireworks. In waking life she was desiring to lose her virginity with her boyfriend. The fireworks may have reflected her feelings about her first time having sex being incredible.