EP 8) Updating your Custom Firmware on a Jailbroken PS3 - YouTube
OLD] How to Jailbreak Your PS3 on Firmware 4.82 or Lower! - YouTube
PS3Xploit and PS3 "BGToolset" Toolset are back, v1.2.006 adds Firmware 4.90 support - Wololo.net
Tutorial - PS3 Downgrade FAQ | CabConModding
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