diff -r 000000000000 -r 6474c204b198 browser/base/content/test/general/browser_zbug569342.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/general/browser_zbug569342.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,81 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+var gTab = null;
+
+function load(url, cb) {
+  gTab = gBrowser.addTab(url);
+  gBrowser.addEventListener("load", function (event) {
+    if (event.target.location != url)
+      return;
+
+    gBrowser.removeEventListener("load", arguments.callee, true);
+    // Trigger onLocationChange by switching tabs.
+    gBrowser.selectedTab = gTab;
+    cb();
+  }, true);
+}
+
+function test() {
+  waitForExplicitFinish();
+
+  ok(gFindBar.hidden, "Find bar should not be visible by default");
+
+  // Open the Find bar before we navigate to pages that shouldn't have it.
+  EventUtils.synthesizeKey("f", { accelKey: true });
+  ok(!gFindBar.hidden, "Find bar should be visible");
+
+  nextTest();
+}
+
+let urls = [
+  "about:config",
+  "about:addons",
+  "about:permissions"
+];
+
+function nextTest() {
+  let url = urls.shift();
+  if (url) {
+    testFindDisabled(url, nextTest);
+  } else {
+    // Make sure the find bar is re-enabled after disabled page is closed.
+    testFindEnabled("about:blank", function () {
+      EventUtils.synthesizeKey("VK_ESCAPE", { });
+      ok(gFindBar.hidden, "Find bar should now be hidden");
+      finish();
+    });
+  }
+}
+
+function testFindDisabled(url, cb) {
+  load(url, function() {
+    ok(gFindBar.hidden, "Find bar should not be visible");
+    EventUtils.synthesizeKey("/", {}, gTab.linkedBrowser.contentWindow);
+    ok(gFindBar.hidden, "Find bar should not be visible");
+    EventUtils.synthesizeKey("f", { accelKey: true });
+    ok(gFindBar.hidden, "Find bar should not be visible");
+    ok(document.getElementById("cmd_find").getAttribute("disabled"),
+       "Find command should be disabled");
+
+    gBrowser.removeTab(gTab);
+    cb();
+  });
+}
+
+function testFindEnabled(url, cb) {
+  load(url, function() {
+    ok(!document.getElementById("cmd_find").getAttribute("disabled"),
+       "Find command should not be disabled");
+
+    // Open Find bar and then close it.
+    EventUtils.synthesizeKey("f", { accelKey: true });
+    ok(!gFindBar.hidden, "Find bar should be visible again");
+    EventUtils.synthesizeKey("VK_ESCAPE", { });
+    ok(gFindBar.hidden, "Find bar should now be hidden");
+
+    gBrowser.removeTab(gTab);
+    cb();
+  });
+}