The ornamental design for a furnituresock, as shown and described.
FIG. 1 is a top perspective view of a furniture sock, showing my design.
FIG. 2 is a bottom perspective view thereof.
FIG. 3 is a front elevation view thereof.
FIG. 4 is a rear elevation view thereof.
FIG. 5 is a left side elevation view thereof.
FIG. 6 is a right side elevation view thereof.
FIG. 7 is a top plan view thereof.
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is a perspective view of the furniture sock, shown in a state of use.
The short-short broken line showing of a furniture sock is for the purpose of illustrating the bounds of the claimed design and forms no part thereof. The long-short broken line showing of a stool is for the purpose of illustrating environmental structure and forms no part of the claimed design.