PS3 Update 4.88 June 1, 2021 Firmware Patch Released - MP1st
PS3 Custom Firmwares (CFWs) : Free Download, Borrow, and Streaming : Internet Archive
PS3 - [Evilnat 4.88.2] PlayStation Store is requiring me to download software | PSX-Place
CFW REBUG 4.88.1 LE | ConsoleCrunch Official Site
PS3 - 4.88 Update is Live! - Official HFW & HEN Released | PSX-Place
PS3 System Update v4.88 Sneaks Out - Download Links are Here - Terminal Gamer - Gaming is our Passion | PS4, PS5, Xbox One X/S, Nintendo Switch, Oculus Quest
GitHub - bucanero/pkgi-ps3: A PlayStation 3 package download tool
IRISMAN v4.90 by various - PS3 Brewology - PS3 PSP WII XBOX - Homebrew News, Saved Games, Downloads, and More!