diff -r ce3b83777055 -r ec62383beb7d launcher/http/src/main/java/org/apidesign/bck2brwsr/launcher/Bck2BrwsrLauncher.java
--- a/launcher/http/src/main/java/org/apidesign/bck2brwsr/launcher/Bck2BrwsrLauncher.java	Mon May 05 14:19:25 2014 +0200
+++ b/launcher/http/src/main/java/org/apidesign/bck2brwsr/launcher/Bck2BrwsrLauncher.java	Mon May 26 16:20:51 2014 +0200
@@ -122,7 +122,7 @@
             + "    args.unshift(ldCls);\n"
             + "    return prevvm.apply(null, args);\n"
             + "  };\n"
-            + "  global.bck2brwsr.registerExtension = prevvm.registerExtension;\n"
+            + "  global.bck2brwsr.register = prevvm.register;\n"
             + "})(this);\n"
         );
         LOG.log(Level.INFO, "Serving bck2brwsr.js", b2b);