I’m not a dog owner but aren’t you supposed to play fireworks on your TV at increasing volume in the preceding days to get them used to it?
That seems a better option than expecting everyone else to change their behaviour because of a pet you chose.
I've never heard that, like fireworks homeopathy or something? Where did you hear that?
Loud action movies seem to help a friend of mine's dog who otherwise acted like fireworks were the devil incarnate.