Ive done it in normal XC gear and would be happy to do so again.
Really depends on you. If you fall off you could land on your face, or you could not.
I did the Passportes Du Soleil in XC gear in the Alps a few weeks ago, felt fine doing that which included all the optional DH runs.
Personally a FF does not make me feel better, sure it may provide more protection, but thats only a may. Im yet to fall off and land on my chin. I wear elbow and knee protection as insurance against any injury stopping me from riding, as these are the bits I seem to damage when falling off. When I fall off I tend not to land on my head, I more typically roll.
Its all about how you personally deal with risk. I personally see head injury lower down the risk scale than knee / elbow injury in my experience of falling off. Thats not to be confused of which would be more serious, just which in my 20ys of crashing I tend to do more.
In short, its not the Alps, you will be fine.