My previous dog was a puppy when the local baseball team won the world series. The neighbor behind us started shooting off fireworks. He got a little freaked out by the first couple, but saw we weren’t really reacting to them, and settled down quickly, and pretty soon was actually watching the guy light them off and then looking up to the sky to watch them explode. After that, any time he heard fireworks he’d run to a window to try to watch them, happy as could be.

My current dog, afaik, has never given a shit about fireworks. We got her at about a year old, so I’m not too sure what, if anything, her previous owners did to desensitize her, but she does not react in the slightest. She is dog reactive though (from being bitten when she was a puppy, we’re working on that, she is very close to actually being friendly with my friends’ dog) so I actually sometimes take advantage of them to take her for a walk because I know no one else is going to be walking their dog.

But I’ve had experience on the other end of the spectrum as well, my first childhood dog was terrified of fireworks (and thunder, and parakeets, and basically anything that could make a loud noise.) She’d start shaking and hide under a bed or in the bathroom. It was sad to watch, and we’d do what we could to help her feel safe and comfortable. We weren’t really fireworks people, but we didn’t begrudge anyone their fireworks over them scaring our dog, it was what it was.