With some of the stuff going off illegally in my neighborhood, it might actually help to keep your fear of fireworks. I don't know where the hell some of the neighbors are getting this ordinance. Are the Soviets still selling off their surplus?
Take the recording of some fire work and play it in your music system and increase its sound step by step at one time you will start to love that sound and the fear will be gone. Thus you will overcome your fear of firework.