diff -r 000000000000 -r 6474c204b198 browser/devtools/netmonitor/test/browser_net_footer-summary.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/netmonitor/test/browser_net_footer-summary.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,116 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test if the summary text displayed in the network requests menu footer
+ * is correct.
+ */
+
+function test() {
+  requestLongerTimeout(2);
+  let { PluralForm } = Cu.import("resource://gre/modules/PluralForm.jsm", {});
+
+  initNetMonitor(FILTERING_URL).then(([aTab, aDebuggee, aMonitor]) => {
+    info("Starting test... ");
+
+    let { $, L10N, NetMonitorView } = aMonitor.panelWin;
+    let { RequestsMenu } = NetMonitorView;
+
+    RequestsMenu.lazyUpdate = false;
+    testStatus();
+
+    waitForNetworkEvents(aMonitor, 8).then(() => {
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-html-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-css-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-js-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-xhr-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-fonts-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-images-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-media-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-flash-button"));
+      testStatus();
+
+      info("Performing more requests.");
+      aDebuggee.performRequests('{ "getMedia": true, "getFlash": true }');
+      return waitForNetworkEvents(aMonitor, 8);
+    })
+    .then(() => {
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-html-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-css-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-js-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-xhr-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-fonts-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-images-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-media-button"));
+      testStatus();
+
+      EventUtils.sendMouseEvent({ type: "click" }, $("#requests-menu-filter-flash-button"));
+      testStatus();
+
+      teardown(aMonitor).then(finish);
+    })
+
+    function testStatus() {
+      let summary = $("#requests-menu-network-summary-label");
+      let value = summary.getAttribute("value");
+      info("Current summary: " + value);
+
+      let visibleItems = RequestsMenu.visibleItems;
+      let visibleRequestsCount = visibleItems.length;
+      let totalRequestsCount = RequestsMenu.itemCount;
+      info("Current requests: " + visibleRequestsCount + " of " + totalRequestsCount + ".");
+
+      if (!totalRequestsCount || !visibleRequestsCount) {
+        is(value, L10N.getStr("networkMenu.empty"),
+          "The current summary text is incorrect, expected an 'empty' label.");
+        return;
+      }
+
+      let totalBytes = RequestsMenu._getTotalBytesOfRequests(visibleItems);
+      let totalMillis =
+        RequestsMenu._getNewestRequest(visibleItems).attachment.endedMillis -
+        RequestsMenu._getOldestRequest(visibleItems).attachment.startedMillis;
+
+      info("Computed total bytes: " + totalBytes);
+      info("Computed total millis: " + totalMillis);
+
+      is(value, PluralForm.get(visibleRequestsCount, L10N.getStr("networkMenu.summary"))
+        .replace("#1", visibleRequestsCount)
+        .replace("#2", L10N.numberWithDecimals((totalBytes || 0) / 1024, 2))
+        .replace("#3", L10N.numberWithDecimals((totalMillis || 0) / 1000, 2))
+      , "The current summary text is incorrect.")
+    }
+
+    aDebuggee.performRequests('{ "getMedia": true, "getFlash": true }');
+  });
+}