i never conversed the argue ?! ;-)
you can circumvent this with perl substitution of the pref.js temporarily during the label printing runtime. or laying down a ff profile and then invoke it with perl if you want to print a html bg. the postscript option is still the best way to go. security is not so much important because it´s for a local repository workspace in a locked environment. you´r right. it has no bearing on perl.