diff -r 000000000000 -r 6474c204b198 toolkit/mozapps/extensions/test/browser/browser_bug567137.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/mozapps/extensions/test/browser/browser_bug567137.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,40 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// Test that the selected category is persisted across loads of the manager
+
+function test() {
+  waitForExplicitFinish();
+
+  open_manager(null, function(aWindow) {
+    let utils = new CategoryUtilities(aWindow);
+
+    // Open the plugins category
+    utils.openType("plugin", function() {
+
+      // Re-open the manager
+      close_manager(aWindow, function() {
+        open_manager(null, function(aWindow) {
+          utils = new CategoryUtilities(aWindow);
+
+          is(utils.selectedCategory, "plugin", "Should have shown the plugins category");
+
+          // Open the extensions category
+          utils.openType("extension", function() {
+
+            // Re-open the manager
+            close_manager(aWindow, function() {
+              open_manager(null, function(aWindow) {
+                utils = new CategoryUtilities(aWindow);
+
+                is(utils.selectedCategory, "extension", "Should have shown the extensions category");
+                close_manager(aWindow, finish);
+              });
+            });
+          });
+        });
+      });
+    });
+  });
+}