Small note if OP is author or author is in the thread: There are two typo's of the word "Firecracker" spelled as "Firecrracker". It's spelled correctly in between and right after the second misspelling.

> Under the hood, they share the same virtualization technology called Firecrracker. Firecracker is a KVM-based virtualization layer that creates and manages minimalistic container-like virtual machines called “microVMs”. Firecrracker is still relatively new and was designed from the ground up to address issues identified with the previous generation of AWS Lambda.