diff -r f78cdceed17b -r 80affbdece28 launcher/fx/src/main/java/org/apidesign/bck2brwsr/launcher/fximpl/FXBrwsr.java
--- a/launcher/fx/src/main/java/org/apidesign/bck2brwsr/launcher/fximpl/FXBrwsr.java	Wed Jun 12 18:19:29 2013 +0200
+++ b/launcher/fx/src/main/java/org/apidesign/bck2brwsr/launcher/fximpl/FXBrwsr.java	Mon Jun 17 18:27:15 2013 +0200
@@ -154,7 +154,6 @@
             LOG.log(Level.FINE, "window: {0}", jsobj);
             Object prev = jsobj.getMember("bck2brwsr");
             if ("undefined".equals(prev)) {
-                System.getProperties().put("webEngine", webEngine);
                 jsobj.setMember("bck2brwsr", bridge);
                 return true;
             }