PS3 System Software 4.83 Update Live, Don't Update Your Firmware! | PSXHAX - PSXHACKS
I tried to downgrade my vita, but when i try to boot it on it remain in it's boot state and now i want to update the vita to the firmware 3.73
PS3 News: multiMAN 4.85 released coming with support for CFW 4.83 to 4.85 - First update to this highly popular backup manager since the release of FW 4.82! - Wololo.net
DON'T UPDATE Your PS3 Firmware Version To 4.83! (CFW PS3 Only) - YouTube
PS3 Firmware 4.90 Download For RPCS3 (Latest Version) - Old ROMs