MiraCFW is a PS4 payload that was created in 2018. Its purpose is to be an all-in-one payload. It enables debug settings and the ability to run homebrew, but also has a bunch of extra features to give the user more control over their system. It currently does not see widespread use due to it being a work in progress as well as having no official firmware 9.00 port. The name "MiraCFW" should not be confused with the PS3, where CFW was permanently installed over the official firmware. MiraCFW runs in memory and is removed after a power cycle.
Mira is an ongoing project that you can contribute to by visiting its GitHub page.