diff -r 000000000000 -r 6474c204b198 browser/devtools/netmonitor/test/browser_net_simple-request.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/netmonitor/test/browser_net_simple-request.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,60 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests if requests are handled correctly.
+ */
+
+function test() {
+  initNetMonitor(SIMPLE_URL).then(([aTab, aDebuggee, aMonitor]) => {
+    info("Starting test... ");
+
+    let { document, NetMonitorView } = aMonitor.panelWin;
+    let { RequestsMenu } = NetMonitorView;
+
+    RequestsMenu.lazyUpdate = false;
+
+    is(document.querySelector("#details-pane-toggle")
+      .hasAttribute("disabled"), true,
+      "The pane toggle button should be disabled when the frontend is opened.");
+    is(document.querySelector("#requests-menu-empty-notice")
+      .hasAttribute("hidden"), false,
+      "An empty notice should be displayed when the frontend is opened.");
+    is(RequestsMenu.itemCount, 0,
+      "The requests menu should be empty when the frontend is opened.");
+    is(NetMonitorView.detailsPaneHidden, true,
+      "The details pane should be hidden when the frontend is opened.");
+
+    aMonitor.panelWin.once(aMonitor.panelWin.EVENTS.NETWORK_EVENT, () => {
+      is(document.querySelector("#details-pane-toggle")
+        .hasAttribute("disabled"), false,
+        "The pane toggle button should be enabled after the first request.");
+      is(document.querySelector("#requests-menu-empty-notice")
+        .hasAttribute("hidden"), true,
+        "The empty notice should be hidden after the first request.");
+      is(RequestsMenu.itemCount, 1,
+        "The requests menu should not be empty after the first request.");
+      is(NetMonitorView.detailsPaneHidden, true,
+        "The details pane should still be hidden after the first request.");
+
+      aMonitor.panelWin.once(aMonitor.panelWin.EVENTS.NETWORK_EVENT, () => {
+        is(document.querySelector("#details-pane-toggle")
+          .hasAttribute("disabled"), false,
+          "The pane toggle button should be still be enabled after a reload.");
+        is(document.querySelector("#requests-menu-empty-notice")
+          .hasAttribute("hidden"), true,
+          "The empty notice should be still hidden after a reload.");
+        is(RequestsMenu.itemCount, 1,
+          "The requests menu should not be empty after a reload.");
+        is(NetMonitorView.detailsPaneHidden, true,
+          "The details pane should still be hidden after a reload.");
+
+        teardown(aMonitor).then(finish);
+      });
+
+      aDebuggee.location.reload();
+    });
+
+    aDebuggee.location.reload();
+  });
+}