My Account is showing no upcoming bookings (I'm going to Kiev on 4 April!) and when I input my booking ref it says there's a technical issue and to try later. First noticed this yesterday when trying to get into MMB to check details of my upcoming trip.

I do find that the most basic of tasks fail to work in Firefox and I regularly have to close and reopen the browser to get it to work. Simple things like getting it to recognise airports when doing a flight search or allowing me to select a travel date.