PS3 4.87.1 HFW (Hybrid Firmware) -

Developer

Joonie

Firmware Base

4.87

Mirror 1

https://www.psx-place.com/threads/4-87-1-ps3-hfw-hybrid-firmware-hfw-is-helpful-for-installing-ps3hen-on-4-84-4-85-4-86-4-87-fw.23094/page-97#post-352597

Mirror 2

https://www.ps3xploit.me/firmware/hfw/HFW_4.87.1_PS3UPDAT.PUP