The ornamental design for a footballhelmetfacemask, as shown and described.
FIG. 1 is a top plan view of a football helmet facemask showing my new design;
FIG. 2 is a left, front, perspective view thereof;
FIG. 3 is a front elevation view thereof; and,
FIG. 4 is a left side elevation view thereof, the right side being a mirror image of the left side.
The broken lines shown in the drawings represent portions of the football helmet facemask that form no part of the claimed design. The broken lines adjoining the solid line claimed matter define the bounds of the claimed design and form no part thereof.
All surfaces which are not shown, other than the right side, form no part of the claimed design.