HFW (hybrid firmware) 4.84 (which consists on 4.84 + some changed files - link to thread) restores HAN capabilities. HAN can be installed on 4.82 OFW but was patched in OFW 4.83.
You also will be able to launch some PS1/PS2 homebrews (converted as PS3 PKG).
This means you will be able to launch custom made PS1/PS2/PSP PKG. It allows you to activate custom signed packages and licenses. it also consists of additional functions relatively close to a CFW., but is limited compared to a CFW, however this is a powerful HEN with some potential for additional features. The only thing this modified firmware essentially does is bring back the patched webkit from OFW 4.82 that was an entry point for PS3Xploit. (Dec, 2020) 4.87.1 Hybrid Firmware can be installed on ANY MODEL PS3 over any Official Firmware (OFW) version.
Notes Jailbreak PS3 & Add Custom Firmware