diff -r 000000000000 -r 6474c204b198 toolkit/content/tests/browser/browser_bug982298.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/content/tests/browser/browser_bug982298.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,87 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+Components.utils.import("resource://gre/modules/Timer.jsm");
+
+const Ci = Components.interfaces;
+
+let tab;
+let browser;
+
+const scrollHtml =
+  "<textarea id=\"textarea1\" row=2>Firefox\n\nFirefox\n\n\n\n\n\n\n\n\n\n" +
+  "</textarea><a href=\"about:blank\">blank</a>";
+
+const scrollTest =
+  "var textarea = content.document.getElementById(\"textarea1\");" +
+  "textarea.scrollTop = textarea.scrollHeight;" +
+  "sendAsyncMessage(\"ScrollDone\", { });"
+
+function test()
+{
+  waitForExplicitFinish();
+
+  tab = gBrowser.addTab("data:text/html;base64," + 
+                        btoa(scrollHtml));
+  browser = gBrowser.getBrowserForTab(tab);
+  gBrowser.selectedTab = tab;
+
+  browser.addEventListener("load", find, true);
+}
+
+function find()
+{
+  browser.removeEventListener("load", find, true);
+  let listener = {
+    onFindResult: function(aData) {
+      browser.finder.removeResultListener(listener);
+
+      ok(aData.result == Ci.nsITypeAheadFind.FIND_FOUND, "should find string");
+
+      browser.messageManager.addMessageListener("ScrollDone",
+                                                function f(aMsg) {
+        browser.messageManager.removeMessageListener("ScrollDone", f);
+        browser.loadURI("about:blank");
+        browser.addEventListener("load", findAgain, true);
+      });
+
+      // scroll textarea to bottom
+      browser.messageManager.loadFrameScript("data:text/javascript;base64," +
+                                             btoa(scrollTest), false);
+
+    },
+  };
+  browser.finder.addResultListener(listener);
+  gFindBar.onFindCommand();
+  EventUtils.sendString("F");
+}
+
+function findAgain()
+{
+  browser.removeEventListener("load", findAgain, true);
+
+  ok(browser.currentURI.spec == "about:blank", "cannot navigate to about:blank");
+  let listener = {
+    onFindResult: function(aData) {
+      browser.finder.removeResultListener(listener);
+      cleanup();
+    },
+  };
+
+  browser.finder.addResultListener(listener);
+  // find again needs delay for crash test
+  setTimeout(function() {
+    // ignore exception if occured
+    try {
+      gFindBar.onFindAgainCommand(false);
+    } catch (e) {
+    }
+    cleanup();
+  }, 0);
+}
+
+function cleanup()
+{
+  gBrowser.removeTab(tab);
+  finish();
+}