ports/163554: www/xpi-showip: make it working with new firefox version

[edwin at FreeBSD.org]

Synopsis: www/xpi-showip: make it working with new firefox version

Responsible-Changed-From-To: freebsd-ports-bugs->rene
Responsible-Changed-By: edwin
Responsible-Changed-When: Fri Dec 23 01:50:48 UTC 2011
Responsible-Changed-Why: 
rene@ wants his PRs (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=163554