Use opn instead of open.

Installed with node@3 and npm install --production

Author: ficristo

src/LiveDevelopment/MultiBrowserImpl/launchers/node/LauncherDomain.js

@@ -26,7 +26,7 @@
 (function () {
     "use strict";
 
-    var open = require("open");
+    var open = require("opn");
 
     /**
      * @private