diff --git a/configure.in b/configure.in
--- a/configure.in
+++ b/configure.in
@@ -5632,16 +5632,21 @@ done],
 if test -z "$MOZ_ENABLE_GNOMEVFS" && test `echo "$MOZ_EXTENSIONS" | grep -c gnomevfs` -ne 0; then
     # Suppress warning on non-X11 platforms
     if test -n "$MOZ_X11"; then
         AC_MSG_WARN([Cannot build gnomevfs without required libraries. Removing gnomevfs from MOZ_EXTENSIONS.])
     fi
     MOZ_EXTENSIONS=`echo $MOZ_EXTENSIONS | sed -e 's|gnomevfs||'`
 fi
 
+dnl Do not build gnomevfs with libxul based apps
+if test -n "$LIBXUL_SDK_DIR" && test `echo "$MOZ_EXTENSIONS" | grep -c gnomevfs` -ne 0; then
+    MOZ_EXTENSIONS=`echo $MOZ_EXTENSIONS | sed -e 's|gnomevfs||'`
+fi
+
 if test -z "$MOZ_JSDEBUGGER" && test `echo "$MOZ_EXTENSIONS" | grep -c venkman` -ne 0; then
     AC_MSG_WARN([Cannot build venkman without JavaScript debug library. Removing venkman from MOZ_EXTENSIONS.])
     MOZ_EXTENSIONS=`echo $MOZ_EXTENSIONS | sed -e 's|venkman||'`
 fi
 
 dnl This might be temporary: build tridentprofile only on Windows
 if test `echo "$MOZ_EXTENSIONS" | grep -c tridentprofile` -ne 0 && test "$OS_ARCH" != "WINNT"; then
     AC_MSG_WARN([tridentprofile extension works only on Windows at this time. Removing tridentprofile from MOZ_EXTENSIONS.])