I have been in the fire service for many years. Was it a Residential fire, commercial fire, car, dumpster, or brush fire? Depending on the type of fire and the amount of smoke exposure you may want to wipe everything down with a damp cloth. It most likely won’t be a problem but there can be some nasty stuff in smoke and it should be avoided when possible. I have seen the smoke from a commercial building warehouse actually corrode the aluminum and chrome on a fire truck (Granted you wouldn’t have been allowed to be near anything like that.). But a quick wipe down to get any residue off wouldn’t hurt, if there is anything on your gear you won’t continually re-expose your self to what was in the smoke, it might be good spring cleaning too.