(adsbygoogle = window.adsbygoogle || []).push({}); Just have 1 question...Im in 4.50 ps3ita and i want to go to rebug 4.78.1 drex i Need to downgrade to 3.55 dex cfw and then Update to 4.78.1 rebug drex right ? I totally forgot about jailbreaking...last time i used a JB PS3 was almost 3 years Ago Ahah

Since it is a higher firmware, there is no need to downgrade. You can simply update to it.

So i just put the 4.78.1 D-rex in a usb and just do the Update without any problems ?

Yes :p

For example If i would like to stay in 4.50 dex ps3 ita could i still go on-line or it really is better updating to rebug 4.78.1 drex ?

Yes but you would need a spoofer cfw setup has one in it