While it is not uncommon for firework explosions to occur in dreams, firecrackers could represent feelings of excitement or distress. For example, if you dreamed about using firecrackers on the Fourth of July and were happy about it, then this might be a sign that you feel excited about life in general. If you instead dreamed about using them in an attempt to start a fire and were scared by it, then this might be a sign that you’re feeling distressed or frightened by your current circumstances.
A firecracker in a dream also signifies a potential or forthcoming disaster. If you feel danger from a firecracker then it’s likely that there is trouble just around the corner and it’s time to be cautious.