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Extras>Themes>PS4 Themes See More
Find the theme named "A Blue Abstract Dynamic Theme" Hit X on it and watch the trailer
If you look at the notifications you see some kind of .pkg file.
Even though this thread is going to get closed, Do you think that it is some kind of Developer FW?

Its possible. i will check this out on mine here in a few minutes

Link me

What do you mean lad?

This is what it looks like on my PS4 when looking at the Trailer. There are two of the videos i looked at and this is what i seen.

A Blue Abstract Dynamic Theme
UT0027-CUSA01672_00-DYNAMICCDF1THEME.pkg Theme installed.

3 Dynamic Death Dealer Skulls Theme
UT0027-CUSA01672_00-DYNAMICDDDSTHEME.pkg Theme installed.

There has got to be a way to get that FW... The thing is, you don't see anything out of the ordinary in the trailer that would indicate a "Special" PS4 FW aside from that.