PlayStation 3: Sony releases Firmware 4.87 for their 14 year old console - HFW 4.87.1 is already out with SEN Enabler already being updated to spoof FW 4.87 - Wololo.net
PS3 Firmware 4.90 is out! (and you really don't want to update) - Wololo.net
How To Bypass PS3 4.90 Update [HEN/CFW] - YouTube
How To Update A HEN Enabled PlayStation 3 (PS3) From 4.89 Or Lower To 4.90! - YouTube
Tutoriel : Comment faire une mise à jour sur une console PS3 | Blog de Hack Console
PS3tuto.com | Remise au propre de son système après jailbreak
How to Jailbreak Your PS3 on Firmware 4.90 or Lower with Flash Writer (Self-Hosted) - YouTube
Firmware-update: Sony PlayStation 3 4.50 - Gaming - Downloads - Tweakers