W00fer on Twitter: "Hey @esc0rtd3w @Mathieulh @PSXPlace @roXyPS3 I have found something interesting. Today I received a new blu-ray movie which requires a software update of the PS3. I'm on 4.81 Rebug
How To Jailbreak/Update PS3 to 4.80 - YouTube
PS3 FIRMWARE V4.81 UPDATE (FIX 2016) - YouTube
Just acquired this PS3 from a thrift store and it's still on Version 2.76 : r/PS3
PS3 4.81 System Software Update PS Vita 3.63 Update DETAILS - YouTube
PS3 System Update 4.81 Is Available Now To Download
23/1/17] How to Jailbreak PS3 4.81 OFW to CFW [Working 23/1/17] - YouTube
PS3 - 4.81 (OFW) Firmware Update Now Live !!! | PSX-Place