--- configure.orig	2015-04-19 09:36:39 UTC
+++ configure
@@ -21798,7 +21798,7 @@ else
 fi
 
 
-MOZILLA_PLUGINDIR=${MOZILLA_PLUGINDIR:-'${libdir}/mozilla/plugins'}
+MOZILLA_PLUGINDIR=${MOZILLA_PLUGINDIR}
 
 
  if test x$enable_browser_plugin = xyes; then
