Following their previous PS4 OFW, today Sony released yet another PS4 System Software / Firmware 6.70 update bringing more stability to further improve the PS4 system performance. 
As always DON'T UPDATE if you wish to use PS4 game backups and homebrew apps when a new jailbreak exploit arrives, and we'll add any related Tweets below as PlayStation 4 scene developers have a chance to examine it.
Download: PS4 Firmware 6.70 Update (US) / PS4 Firmware 6.70 Update (EU) / PS4 Firmware 6.70 Update (UK) / PS4 Firmware 6.70 Update (AU/NZ) / PS4 Firmware 6.70 Update (JP)
Changelog:
About PlayStation 4 system software version 6.70
Main features in version 6.70 update
Here are some guides for those new on How to Block PS4 Firmware Updates, How to Delete Downloaded PS4 Update PUPs that haven't been installed yet, How to Update to a Specific PS4 Firmware and also some PS4 HEN Update Blocker Payloads.
From Pastebin.com:
From PS4 Kernel Build Strings:
Download: PS4 Firmware 6.70 Update (US) / PS4 Firmware 6.70 Update (EU) / PS4 Firmware 6.70 Update (UK) / PS4 Firmware 6.70 Update (AU/NZ) / PS4 Firmware 6.70 Update (JP)
Changelog:
About PlayStation 4 system software version 6.70
Main features in version 6.70 update
- This system software update improves system performance.
From Pastebin.com:
Code:
6.70 !
Twitter : https://twitter.com/ImMrNiato
release: 0x06700061
build: cex
security-repository-path: release_branches/release_06.700
security-revision: 9926
sys-repository-path: release_branches/release_06.700
sys-revision: 124152
***-internal-build-number: 111228
middleware-repository-path: release_branches/release_06.700
middleware-revision: 21025
middleware-build-number: 71441
vsh-repository-path: release_branches/release_06.700
vsh-revision: 180634
vsh-build-number: 1134512
Code:
r124152/release_branches/release_06.700 May 22 2019 05:42:57