Fireworks are awesome, that's why I've made this resource pack which includes all you need to make great scenery designs and fireworks effects to give your sky a fantastic look. 

Content
Blender file

Fireworks particle systems, including trails, materials and 4 cameras placed on different angles to make quick render variations. Distributed over different collections for an easy management.

20 fireworks + 1 variation of each one (PNG)

6 fireworks groups (PNG)

6 trails + 1 variation of each one (PNG)

8 simple trails (PNG)

NOTE: This is not an addon, so you don't need to install anything.