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 HEN 3.0.3 Released w/ FW 4.88 Support - Hackinformer
PlayStation 3 system software - Wikipedia
PS3 - 4.88.1 HFW (Hybrid FirmWare) | PSX-Place
PS3: PlayStation Home back to life on latest firmware 4.88 (OFW) thanks to homebrew developers - Wololo.net
$35 from the thrift store, never opened up, firmware 4.87 (now 4.88) been used until 2016. needs an opening up now, cleaning and stuff. really happy to get a slim! : r/PS3
PS3 system update 4.89 removes PSN account creation | TheSixthAxis