Grr... Some people are just so stupid. Is this not enough reason to make fireworks a licensed commodity so only sensible people can use them and have access to them?
Perhaps a few walks towards dusk might settle her down a bit. For the first time hang around your home so as soon as she shows sign of stress you can have her home in a flash. Later as things go well, go home gradually when it becomes darker. Perhaps she will settle.
I am not usually sympathetic towards dog owners who have a problematic dog because of their own stupidity, but this was beyond your control and I hope you will be able to cure her of the nerves.