PlayStation 3: Sony releases Firmware 4.86 for their 13 year old console - HFW 4.86 released, SEN Enabler updated & PS3HEN to be updated soon due to no kernel changes! - Wololo.net
PS3 Update to System Software 4.89: Here's a Full Guide for You - MiniTool Partition Wizard
Download Now PS4 Firmware Update 1.72 and PS3 Firmware 4.60 to Improve Stability
PlayStation 3 - Wikipedia
New PS3 Firmware Update 4.90 Now Available to Download - PlayStation LifeStyle