The ornamental design for a lower frontbumpercover, as shown and described.
FIG. 1 is a front perspective view of a lower front bumper cover showing our new design;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a right side view thereof; and,
FIG. 7 is a left side view thereof.
It will be understood that the broken lines shown in the drawings illustrate portions of the lower front bumper cover that form no part of the claimed design.