The ornamental design for an airfire lighter, as shown and described.
FIG. 1 is a perspective view of an air fire lighter, showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines in the drawing views represent unclaimed portions of an air fire lighter, which are included for the purpose of illustrating unclaimed environment only, and forms no part of the claimed design.