It is apparently possible to revert your PS4 to its previous firmware version, without any backup - Wololo.net
NEW PLAYSTATION 4 SYSTEM SOFTWARE UPDATE 10.00 RELEASED! DOWNLOAD IT NOW! - YouTube
Did stupid thing on CSL Elite F1 for PS4 — Fanatec Forum
How to check for PlayStation 4 firmware updates | Android Central
Check the version of your PS4 system software - YouTube
PS4 Firmware 4.50 / 4.55 Jailbreak Achieved, Claims Luca Todesco | Redmond Pie
PS4 Pro: How to do a System Software Update to Latest Firmware Version - YouTube
Report: Sony's Latest Firmware Update For PlayStation 4 Could Be One Of Its Biggest Yet
PlayStation 4 system software - Wikipedia
MrNiato PlayStation 4 Testkit DUH-T1000AA DEX 3.50 Firmware Demo | PSXHAX - PSXHACKS
Have an eight-minute look at PS4 firmware update 2.50 - video | VG247
Are you guaranteed to get a PS4 with firmware 5.05 or lower if you buy it now? - Wololo.net
PS4's 9.60 update: 5 problems and fixes that we found
PS4 update 8.00 problems: Should you really update to latest firmware? | Gaming
PS4 Firmware Update 8.50 Is Available to Download Now | Push Square
Check What Firmware a PS4 Game Requires | Quick Testing of CGFw v2.24 - YouTube
PSA: PS4 firmware v9.0 update bricks PlayStation 4 consoles
Low Firmware Score. : r/ps4homebrew
GitHub - OfficialAhmed/Check-Game-Firmware: Required PS4 Games' firmware
PS5 Firmware 7.00 and PS4 Firmware 10.50 Released (Do not update!) - Wololo.net
GitHub - pearlxcore/PS4-Firmware-Checker: Checking the latest PS4 firmware (System & Recovery FW)
PS4 5.50 Jailbreak? Firmware 4.55 Public Exploit Rewritten To Work With 5.50, Here Are The Details | Redmond Pie
How to Check for Game Updates on a PS5
![RUMOR] PlayStation Vita "Henkaku" Hack Leads Way to PlayStation 4 Hack on Latest Firmware | TechRaptor](https://techraptor.net/sites/default/files/styles/image_header/public/imports/http%3A//techraptor.net/wp-content/uploads/2016/07/playstation-4-system-software-header.jpg?itok=YCgEwL6g "RUMOR] PlayStation Vita \"Henkaku\" Hack Leads Way to PlayStation 4 Hack on Latest Firmware | TechRaptor")
RUMOR] PlayStation Vita "Henkaku" Hack Leads Way to PlayStation 4 Hack on Latest Firmware | TechRaptor
How to Update System Software on PS4: 13 Steps (with Pictures)
![Bundle Guide] How to find a PS4 with a 4.05 firmware or lower : r/ps4homebrew](https://external-preview.redd.it/HbsMoCALIySw0fC4kRi_UWWZtiFxQDLaWGlYeEEurWM.jpg?width=640&crop=smart&auto=webp&s=a3a299010494cddb2b33c03146f7fcc2004725e5 "Bundle Guide] How to find a PS4 with a 4.05 firmware or lower : r/ps4homebrew")
Bundle Guide] How to find a PS4 with a 4.05 firmware or lower : r/ps4homebrew
![Screenshot] Beta 6.0 Firmware update emails so check your emails. : r/PS4](https://external-preview.redd.it/REXWbSqVxG26j4QhgHO-VLoV4pgMpu_URFGwTYEQFxw.png?width=640&crop=smart&auto=webp&s=a3d04bd3e6e86f1af992a050fa4e92d7bbb50fe5 "Screenshot] Beta 6.0 Firmware update emails so check your emails. : r/PS4")