The only reason downgrading exists on older consoles (FW 5.05 or below) is because hackers found a way to gain full control at the hardware level before the fuse check happens. For 9.60, no such public exploit exists.
In this article, we'll guide you through the process of downgrading your PS4 from 9.60 to 9.00. Please note that downgrading your PS4's firmware can be a complex and risky process, and it's essential to follow the steps carefully to avoid any potential issues. how to downgrade ps4 9.60 to 9.00
and requires advanced hardware modification. Sony’s security prevents users from installing older firmware via USB or hard drive replacement. ConsoleMods Wiki The only reason downgrading exists on older consoles (FW 5