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diff --git a/layout/reftests/image-rect/background-test-parser.html b/layout/reftests/image-rect/background-test-parser.html
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+++ b/layout/reftests/image-rect/background-test-parser.html
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+<!DOCTYPE html>
+<!--
+    Any copyright is dedicated to the Public Domain.
+    http://creativecommons.org/licenses/publicdomain/
+
+    Checks if the CSS parser can parse variations of -moz-image-rect() syntax
+    correctly or fail gracefully.
+-->
+<html>
+  <head>
+    <title>Testcases: -moz-image-rect() [bug 113577]</title>
+    <style>
+      div.wrapper {
+        width: 32px;
+        height: 32px;
+        margin: 10px;
+        background-color: red;
+      }
+      div.wrapper div {
+        width: 32px;
+        height: 32px;
+        background: no-repeat;
+      }
+      #test1 {
+        /* tests shorthand notation */
+        background: transparent scroll no-repeat 0px 0px -moz-image-rect(url(green-16x16-in-blue-32x32.png), 0, 16, 16, 0);
+      }
+      #test2 {
+        /* URL can be a quoted string */
+        background-image: -moz-image-rect('green-16x16-in-blue-32x32.png',0,16,16,0);
+      }
+      #test3 {
+        /* URL can be a quoted string */
+        background-image: -moz-image-rect( "green-16x16-in-blue-32x32.png" , 0 , 16 , 16 , 0 );
+      }
+      #test4 {
+        /* Non-quoted URL is not allowed. When the parser encounters a syntax
+           error, it skips until the closing parenthesis, so background-color
+           should be painted with yellow since -moz-image-rect(...) is ignored. */
+        background-image: -moz-image-rect(green-16x16-in-blue-32x32.png, 0, 16, 16, 0);
+        background-color: yellow;
+      }
+      #test5 {
+        /* Non-quoted URL is not allowed. When the parser encounters a syntax
+           error, it skips until the closing parenthesis, so background-color
+           should be ignored since there is no matching closing parenthesis. */
+        background-image: -moz-image-rect(green-16x16-in-blue-32x32.png, 0, 16, 16, 0;
+        background-color: yellow;
+      }
+      #test6 {
+        /* this is ignored due to the missing closing parenthesis in #test5 */
+        background-color: yellow;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="wrapper"><div id="test1"></div></div>
+    <div class="wrapper"><div id="test2"></div></div>
+    <div class="wrapper"><div id="test3"></div></div>
+    <div class="wrapper"><div id="test4"></div></div>
+    <div class="wrapper"><div id="test5"></div></div>
+    <div class="wrapper"><div id="test6"></div></div>
+  </body>
+</html>