The ornamental design for a furnitureriser, as shown and described.
FIG. 1 is a perspective view of a furniture riser design showing my new design.
FIG. 2 is an exploded view of a furniture riser.
FIG. 3 is a front view of a furniture riser.
FIG. 4 is a rear view of a furniture riser.
FIG. 5 is a left side view of a furniture riser.
FIG. 6 is a right side view of a furniture riser.
FIG. 7 is a top view of a furniture riser.
FIG. 8 is a bottom view of a furniture riser.
FIG. 9 is a cross-sectional view of a furniture riser taken along line 9-9 in FIG. 3; and,
FIG. 10 is cross-sectional view of a furniture riser taken along line 10-10 in FIG. 4.
Any shading and cross-hatching are not features of the design but are utilized to illustrate the surface contours of the furniture riser design in the drawings.