I've downgraded the webbrowser on 10.3 O3DS EmuNAND to SpiderV1.7567EUR-0004003000009D02 - and got an fw update notification on the homemenu. Does the system want to update the browser? Or is a 10.4 FW out?
I believe it's a server check.3DNUS has an option to change the version number - is this not enough?