load pxl browser even if pxl is not installed.
needed for rpc setup
(from redmine: issue id 1157, created on 2012-08-30 by gmueller, closed on 2012-11-13)
needed for rpc setup
(from redmine: issue id 1157, created on 2012-08-30 by gmueller, closed on 2012-11-13)