It is built on the 4.91 Official Firmware (OFW), meaning you keep full access to the PlayStation Network (PSN) and the latest Blu-ray playability.
Before installing, check the MD5 hash of your .PUP file to ensure the download wasn't corrupted.
It swaps out a specific file in the official 4.91 update—the —with an older, vulnerable version from firmware 4.82. This "hybrid" approach allows the console to look and act like an official system while remaining susceptible to the PS3HEN (Homebrew ENabler) exploit. Why Version 4.91.1 Matters HFW-4.91.1-PS3UPDAT.PUP
Pro Tip: It is often recommended to install HFW to ensure the vulnerable browser files fully overwrite the official ones.
Installing HFW is generally very safe. Because it does not modify the core "LV2" kernel of the system, the risk of "bricking" (breaking) your console is near zero. However, always remember: It is built on the 4
Place the downloaded file into the UPDATE folder and ensure it is named exactly PS3UPDAT.PUP .
Plug the USB into the right-most port of your PS3. Navigate to Settings > System Update > Update via Storage Media . This "hybrid" approach allows the console to look
Sony released the official 4.91 firmware update in early 2024. While it was primarily a "system stability" and "encryption key" update for Blu-ray compatibility, it effectively blocked previous exploits.
While HFW is safe for PSN, syncing trophies or playing online with homebrew enabled carries a small risk of a ban. Most users disable "syscalls" before going online. Conclusion
Run tools like multiMAN or Irisman for file management. Emulation: Play retro games via RetroArch.