PS3 - Do i need E3 flasher again while updating cfw to latest version

EXPLOIT]Rogero CFW CEX 4.55 1.00, 4.50, 4.46, 4.41, 4.40 , 4.30 et 4.21 : Exploit PS3 - PS3-Infos

Should I keep updating my PS3?

100% brand new and high quality, Features：, Firmware downgrade tool, firmware backup tool for PS3 game console., E3 NOR FLASHER Hardcover Edition

for PS3 E3 Nor Flasher Game Console Host Hardcover Edition Downgrade Tool Kit

Ps3 jb king dongle

E3 - PS3 Developer wiki

Tutorial - E3 flasher error codes.

PS3 firmware help ^_^

PS3 Firmware 4.81 Update Released, Improves System Stability, Page 3

When turning on my ps3 I suddenly got this error screen and it won't go away. Every time I boot up my ps3 it is there. I've never jailbroken my ps3 but

Playstation Cyprus Repair & Modification Service - Nicosia

PS3DumpChecker Build 488 by Littlebalup Out with PS3 4.80 Support, Page 2

How to Hack your PS3 - ConsoleMods Wiki

Tools and parts : E3 NOR Flasher Limited Edition kit (PS3), incl. ESATA HDD Station - SHOP01MEDIA - console accessories and mods, retro, shop - One Stop Shop!