Okie dokie there are two different ways that you can do this.
First, when you customize your character, roll for a perk, and if you get lucky, you can unlock one that lets you spawn in with firecrackers.
Second, the other is the luck of finding firecrackers within the map.
Lastly, you will be chased by Jason. So just throw down some firecrackers and run! Thanks to TheOnlyMatto for letting me know that it will NOT count when Jason is in RAGE mode!
Good Luck!