Install Android 4.4.2
As always, before proceeding to the firmware change is advisable to back up your files to prevent any accidental loss of data.
Extra firmware
Download Odin 3 v3.09
Open Odin and restart the phone in download mode (Home + Power + Volume Down button pressed)
Connect your phone and wait for the blue sign of Odin
Add I9505XXUFNA1_I9505OXAFNA1_I9505XXUFNA1_HOME.tar.md5 AP
Expected to complete the installation
In case of any problem, you can restart the phone in recovery mode (Home + Power + Volume up) and do a factory reset to return your phone to its original state.