Stefan Fiedler:

package/x11/mozilla/mozilla.conf

@@ -40,7 +40,7 @@ moz_implant_version() {
 }
 
 moz_configure() {
-	        cat >> .mozconfig <<-EOT
+	cat >> .mozconfig <<-EOT
 # sh
 # Build configuration script
 # Options for client.mk.
@@ -48,6 +48,7 @@ moz_configure() {
 
 # Options for 'configure' (same as command-line options).
 ac_add_options --prefix=$root/$prefix
+ac_add_options --libdir=$root/$libdir
 ac_add_options --sysconfdir=$root/etc/$pkg
 ac_add_options --localstatedir=$root/var
 ac_add_options --host=$arch_target
@@ -57,13 +58,16 @@ ac_add_options --disable-dtd-debug
 ac_add_options --disable-tests
 ac_add_options --disable-pedantic
 ac_add_options --enable-xft
-ac_add_options --disable-freetype2
 ac_add_options --enable-default-toolkit=gtk2
 export BUILD_OFFICIAL=1
 export MOZILLA_OFFICIAL=1
 mk_add_options BUILD_OFFICIAL=1
 mk_add_options MOZILLA_OFFICIAL=1
 EOT
+for lib in zlib libjpeg libpng libmng ; do
+	pkginstalled $lib && echo ac_add_options --with-system-${lib#lib} >> .mozconfig
+done
+
 }
 
 moz_build() {