The ornamental design for a firescreen, substantially as shown and described.
FIG. 1 is a perspective view of a fire screen showing my new design;
FIG. 2 is a front elevational view thereof shown on a slightly larger
scale;
FIG. 3 is right side elevational view thereof; and
FIG. 4 is a bottom plan view thereof.
The pattern shown fragmentarily on the four front panels is understood to
repeat uniformly across the entire indicated area. The rear of the device
is completely open and includes no additional portions not shown in the
drawings.