I've been hearing from friends from other parts of the country complain about this new increase too, so I tried to Google if there any news stories about this. It looks like very similar things are happening in multiple cities the last couple of weeks:

NY State: https://www.syracuse.com/crime/2020/06/fireworks-continue-to-infuriate-syracuse-neighbors-and-were-not-alone.html

https://www.wgrz.com/article/news/local/fireworks-complaints-going-off-across-western-new-york/71-61596f2e-3d00-480c-befb-c5cddc174969

https://www.rochesterfirst.com/news/local-news/hearing-more-fireworks-on-the-streets-this-year-youre-not-alone/

RI: https://www.wpri.com/news/local-news/providence/surge-in-fireworks-complaints-leaves-many-rhode-islanders-with-a-short-fuse/

MA: https://www.bostonherald.com/2020/06/10/fireworks-complaints-in-boston-soar-during-coronavirus-pandemic/

LA: https://laist.com/latest/post/20200620/fireworks-LA-losangeles-june-why

Bay area: https://abc7news.com/why-are-dogs-scared-of-fireworks-illegal-near-me-juneteenth/6258266/

CT: https://www.nbcconnecticut.com/news/local/sleepless-in-connecticut-residents-complain-about-fireworks/2288500/

MD: https://www.baltimoresun.com/maryland/baltimore-city/bs-md-ci-residents-debate-response-to-constant-baltimore-fireworks-20200616-wnbc4tykovdrjadrat5t4ebxve-story.html'

Not really sure what this means. Maybe it's a coincidence, maybe people everywhere are just extra needing to blow off steam, maybe there is a surplus of fireworks being offloaded, or maybe it's a coordinated op. Nobody knows why it's happening, or how to stop it. But I don't think this is just a problem inherent to NYC like people seem to be implying if it's happening all over, even in quieter places.