Go to File > Install Firmware in the top menu.

For the best experience and 100% compatibility, you should download the official firmware file directly from the PlayStation 3 System Software Update page . : The file must be named exactly PS3UPDAT.PUP .

Ignore the "39link" results. Ignore the "high quality BIOS" YouTube videos. Use RPCS3’s built-in firmware installer. Your system’s security—and a stable emulation experience—depends on it.