Extract files from firmware, you will get 5 files, AP, BL , CP, CSC and Home_CSC
open Odin and connect your phone with pc, it will show you message of Added in left column. in right column, browse AP, BL , CP and Home_CSC. (If you dont want your previous data, select CSC file or if you want to keep app and Data as previous, select HOME_CSC)
Then click on start, it will show you message of PASS, if everything works good.