A "jailbreak" (technically a ) allows you to run unsigned software, but is generally non-persistent, meaning it must be reapplied every time the console is fully powered off.
Widely considered the most stable and popular version; it requires a USB drive with a specific image file to trigger the exploit. PS4 Jailbreak firmware
Older versions that are also jailbreakable but can sometimes suffer from lower stability (higher frequency of "kernel panics"). Non-Jailbreakable Firmwares A "jailbreak" (technically a ) allows you to