Surprise! There's a new PS3 firmware update - here's what patch 4.88 does | TheSixthAxis
PS3 Firmware 2.70 Direct Download Link - PlayStation LifeStyle
PlayStation 3 updated to official firmware version 4.87 | GBAtemp.net - The Independent Video Game Community
If I have a Dex jailbroken PS3 on 4.84, can I still get online even though the latest version is 4. 84? If not, how do I update it without ruining the jailbreak? - Quora