diff -r 000000000000 -r 6474c204b198 dom/workers/test/console_worker.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/workers/test/console_worker.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,104 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+onmessage = function(event) {
+  // TEST: does console exist?
+  postMessage({event: 'console exists', status: !!console, last : false});
+
+  postMessage({event: 'trace without function', status: true, last : false});
+
+  for (var i = 0; i < 10; ++i) {
+    console.what('1', 123, 321);
+  }
+
+  for (var i = 0; i < 10; ++i) {
+    console.log(i, i, i);
+  }
+
+  function trace1() {
+    function trace2() {
+      function trace3() {
+        console.trace("trace " + i);
+      }
+      trace3();
+    }
+    trace2();
+  }
+  trace1();
+
+  foobar585956c = function(a) {
+    console.trace();
+    return a+"c";
+  };
+
+  function foobar585956b(a) {
+    return foobar585956c(a+"b");
+  }
+
+  function foobar585956a(omg) {
+    return foobar585956b(omg + "a");
+  }
+
+  function foobar646025(omg) {
+    console.log(omg, "o", "d");
+  }
+
+  function startTimer(timer) {
+    console.time(timer);
+  }
+
+  function stopTimer(timer) {
+    console.timeEnd(timer);
+  }
+
+  function testGroups() {
+    console.groupCollapsed("a", "group");
+    console.group("b", "group");
+    console.groupEnd("b", "group");
+  }
+
+  foobar585956a('omg');
+  foobar646025('omg');
+  testGroups();
+  startTimer('foo');
+  setTimeout(function() {
+    stopTimer('foo');
+    nextSteps(event);
+  }, 10);
+}
+
+function nextSteps(event) {
+
+  function namelessTimer() {
+    console.time();
+    console.timeEnd();
+  }
+
+  namelessTimer();
+
+  var str = "Test Message."
+  console.foobar(str); // if this throws, we don't execute following funcs
+  console.log(str);
+  console.info(str);
+  console.warn(str);
+  console.error(str);
+  console.exception(str);
+  console.assert(true, str);
+  console.assert(false, str);
+  console.profile(str);
+  console.profileEnd(str);
+  postMessage({event: '4 messages', status: true, last : false});
+
+  // Recursive:
+  if (event.data == true) {
+    var worker = new Worker('console_worker.js');
+    worker.onmessage = function(event) {
+      postMessage(event.data);
+    }
+    worker.postMessage(false);
+  } else {
+    postMessage({event: 'bye bye', status: true, last : true});
+  }
+}