I'm not on Firefox.
Apple devices via Safari, iOS 9.3.1.
I just cleared all history (caches etc) re-logged on. Still no joy
Blank screen.
Work PC is windows explorer.
Blank screen.
I don't notice anything odd in my profile but maybe it's just me?
Everything else along the taskbar (Control Panel, Gallery etc) work as they should.
I'll miss the Tech Portal