diff -r 000000000000 -r 6474c204b198 toolkit/components/places/tests/autocomplete/test_match_beginning.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/places/tests/autocomplete/test_match_beginning.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Test bug 451760 which allows matching only at the beginning of urls or
+ * titles to simulate Firefox 2 functionality.
+ */
+
+// Define some shared uris and titles (each page needs its own uri)
+let kURIs = [
+  "http://x.com/y",
+  "https://y.com/x",
+];
+let kTitles = [
+  "a b",
+  "b a",
+];
+
+addPageBook(0, 0);
+addPageBook(1, 1);
+
+// Provide for each test: description; search terms; array of gPages indices of
+// pages that should match; optional function to be run before the test
+let gTests = [
+  // Tests after this one will match at the beginning
+  ["0: Match at the beginning of titles",
+   "a", [0],
+   function() setBehavior(3)],
+  ["1: Match at the beginning of titles",
+   "b", [1]],
+  ["2: Match at the beginning of urls",
+   "x", [0]],
+  ["3: Match at the beginning of urls",
+   "y", [1]],
+  
+  // Tests after this one will match against word boundaries and anywhere
+  ["4: Sanity check that matching anywhere finds more",
+   "a", [0,1],
+   function() setBehavior(1)],
+];
+
+function setBehavior(aType) {
+  prefs.setIntPref("browser.urlbar.matchBehavior", aType);
+}