If you are a standard gamer, stay on your current firmware and wait for the next jailbreak. If you are a hardware enthusiast with a soldering station and a backup PS4, visit the GBAtemp forums for the legitimate Syscon flashing suite.
True system-wide downgrading is not possible with software alone. Instead, the community uses a "Firmware Revert" method. This works because the PS4 motherboard stores two firmware versions: the current active one and the one immediately preceding it. How it Works Ps4 Tool Downgrade V1.00 Download
Technical Analysis of PS4 Firmware Reverting and "Downgrade Tool" Security If you are a standard gamer, stay on
UI elements: clear progress bar, step counters, copyable error codes, "Cancel" with explanation, "Expert mode" hidden. Instead, the community uses a "Firmware Revert" method
: If you need to wipe your data to resolve performance issues or sell the console, use the "Initialize PS4" option found in the system settings . How To Play Older Versions Of PS4 Games [No Jailbreak]
: If you have a game or system issue tied to a specific firmware version, report it through Sony's official channels .