Offset faces in one go

 From:  Frenchy Pilou (PILOU)
10376.31 
@ Burr Cool Subdiv modeling! ;)

For the French Tips & Tricks! ;)
https://moiscript.weebly.com/trucs-astuces.html somewhere on the page dedicaced! :)

EDITED: 25 Jun 2021 by PILOU