Self Sparkler

Self Sparkler prevents firework rockets that would normally deal damage from doing so when the rocket is used by a player that is flying using an Elytra.

Fly in style using vanilla's extensively customizable rockets!

It prevents all entities from being damaged by the rocket, not just the player that used the rocket. That way you don't kill your pets flying out of your base. Also so you can give friends piggy back rides using FSit without exploding them. Not that that has happened to me or anything ;)