I followed roughly what @kvetner told me after seeing his entry for the Fireworks Challenge
ISO-100 and 3-4 second shutter.
I dropped the shutter speed slightly to capture what I was after but it just depends on how much you want in your photos.
I’d reccomend between 1-3 seconds to get the best of the firework but keep the iso as low as possible to reduce noise.
This one was shot in fully Auto mode… which isnt bad at all, i just wanted longer trails.
ISO 1540 - 1.4sec shutter
If you base your settings on the above you wont go far wrong, you just need to nail the timings of the explosions. 