How To] Downgrade Fat PS3 From 4.66 to 3.55 Firmware Using E3 Flasher Tutorial (Part 3 of 3) - YouTube
Playstation 3 Custom Firmware CEX DEX PS3 CFW Version CEX
How to Jailbreak a PS3 (with Pictures) - wikiHow
How to install Custom Firmware on the PS3 with FW 4.82 - Hackinformer
Downgradable PS3 Models & Base Firmware with MinVerChk | PSXHAX - PSXHACKS
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
PlayStation 3 — Wikipédia
Hackable PS3 models and information | GBAtemp.net - The Independent Video Game Community