diff -r 000000000000 -r 6474c204b198 browser/devtools/netmonitor/test/browser_net_accessibility-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/netmonitor/test/browser_net_accessibility-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,83 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests if focus modifiers work for the SideMenuWidget.
+ */
+
+function test() {
+  initNetMonitor(CUSTOM_GET_URL).then(([aTab, aDebuggee, aMonitor]) => {
+    info("Starting test... ");
+
+    // It seems that this test may be slow on Ubuntu builds running on ec2.
+    requestLongerTimeout(2);
+
+    let { NetMonitorView } = aMonitor.panelWin;
+    let { RequestsMenu } = NetMonitorView;
+
+    RequestsMenu.lazyUpdate = false;
+
+    waitForNetworkEvents(aMonitor, 2).then(() => {
+      check(-1, false);
+
+      RequestsMenu.focusLastVisibleItem();
+      check(1, true);
+      RequestsMenu.focusFirstVisibleItem();
+      check(0, true);
+
+      RequestsMenu.focusNextItem();
+      check(1, true);
+      RequestsMenu.focusPrevItem();
+      check(0, true);
+
+      RequestsMenu.focusItemAtDelta(+1);
+      check(1, true);
+      RequestsMenu.focusItemAtDelta(-1);
+      check(0, true);
+
+      RequestsMenu.focusItemAtDelta(+10);
+      check(1, true);
+      RequestsMenu.focusItemAtDelta(-10);
+      check(0, true);
+
+      aDebuggee.performRequests(18);
+      return waitForNetworkEvents(aMonitor, 18);
+    })
+    .then(() => {
+      RequestsMenu.focusLastVisibleItem();
+      check(19, true);
+      RequestsMenu.focusFirstVisibleItem();
+      check(0, true);
+
+      RequestsMenu.focusNextItem();
+      check(1, true);
+      RequestsMenu.focusPrevItem();
+      check(0, true);
+
+      RequestsMenu.focusItemAtDelta(+10);
+      check(10, true);
+      RequestsMenu.focusItemAtDelta(-10);
+      check(0, true);
+
+      RequestsMenu.focusItemAtDelta(+100);
+      check(19, true);
+      RequestsMenu.focusItemAtDelta(-100);
+      check(0, true);
+
+      teardown(aMonitor).then(finish);
+    });
+
+    let count = 0;
+
+    function check(aSelectedIndex, aPaneVisibility) {
+      info("Performing check " + (count++) + ".");
+
+      is(RequestsMenu.selectedIndex, aSelectedIndex,
+        "The selected item in the requests menu was incorrect.");
+      is(NetMonitorView.detailsPaneHidden, !aPaneVisibility,
+        "The network requests details pane visibility state was incorrect.");
+    }
+
+    aDebuggee.performRequests(2);
+  });
+}