: If your goal is to fix bugs rather than jailbreak, you can perform a "reinstallation" of your current firmware using a USB drive in Safe Mode. This refreshes the system files without moving to an older version.
As of mid-2025, 11.00 has been heavily targeted for jailbreaks, with many users attempting to revert to this version to unlock their consoles. ps4 downgrade tool
The PlayStation 4 does not have a native, software-only way to downgrade its firmware once an update is installed : If your goal is to fix bugs