I purchased a PS3 backward compatible from ebay for a good price and I'm impressed how clean it is. However... It's still on firmware 2.50. Should I update the firmware? : r/PS3
How to downgrade ps3 firmware and jailbreak the console
How to install Custom Firmware on the PS3 with FW 4.82 - Hackinformer
Downgrade Ps3 4.87 Easy Menthod 2021 - YouTube
How to downgrade ps3 firmware and jailbreak the console
How To Downgrade the Fat PS3 from 4.66 to 3.55 Firmware Using E3 Flasher Tutorial | Welcome to the Underground.
EP 10) How to Downgrade PS3 CFW - YouTube
Playstation 3 manufactured in december/2008 running Firmware 2.80 complete with Playstation Home and the notification bar :3 : r/PS3
PS3 - Chapter I - PS3 Downgrade General Information | PSX-Place