Add delays so firefox can catch up

client/commonFramework/update-preview.js

@@ -61,7 +61,7 @@ window.common = (function(global) {
           .first()
           // the delay here is to give code within the iframe
           // control to run
-          .delay(100);
+          .delay(400);
       })
       .map(() => code);
   };

client/iFrameScripts.js

@@ -40,7 +40,8 @@ window.$(document).ready(function() {
         return Rx.Observable.throw(window.__err);
       }
 
-      return Rx.Observable.from(tests)
+      return Rx.Observable.from(tests, null, null, Rx.Scheduler.default)
+        .delay(100)
         .map(test => {
           const userTest = {};
           common.appendToOutputDisplay('');