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diff --git a/dom/base/test/test_anonymousContent_manipulate_content.html b/dom/base/test/test_anonymousContent_manipulate_content.html
new file mode 100644
index 000000000..ef4c00287
--- /dev/null
+++ b/dom/base/test/test_anonymousContent_manipulate_content.html
@@ -0,0 +1,74 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1020244
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1020244 - Manipulate content created with the AnonymousContent API</title>
+  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1020244">Mozilla Bug 1020244</a>
+<div>
+  <div id="test-element" class="test-class" test="test">text content</div>
+</div>
+  <script type="application/javascript;version=1.8">
+
+  // Insert content
+  let chromeDocument = SpecialPowers.wrap(document);
+  let testElement = document.querySelector("div");
+  let anonymousContent = chromeDocument.insertAnonymousContent(testElement);
+
+  // Test getting/setting text content.
+  is(anonymousContent.getTextContentForElement("test-element"),
+    "text content", "Textcontent for the test element is correct");
+
+  anonymousContent.setTextContentForElement("test-element",
+    "updated text content");
+  is(anonymousContent.getTextContentForElement("test-element"),
+    "updated text content",
+    "Textcontent for the test element is correct after update");
+
+  // Test that modifying the original DOM element doesn't change the inserted
+  // element.
+  testElement.removeAttribute("test");
+  is(anonymousContent.getAttributeForElement("test-element", "test"),
+    "test",
+    "Removing attributes on the original DOM node does not change the inserted node");
+
+  testElement.setAttribute("test", "test-updated");
+  is(anonymousContent.getAttributeForElement("test-element", "test"),
+    "test",
+    "Setting attributes on the original DOM node does not change the inserted node");
+
+  // Test getting/setting/removing attributes on the inserted element and test
+  // that this doesn't change the original DOM element.
+  is(anonymousContent.getAttributeForElement("test-element", "class"),
+    "test-class", "Class attribute for the test element is correct");
+
+  anonymousContent.setAttributeForElement("test-element", "class",
+    "updated-test-class");
+  is(anonymousContent.getAttributeForElement("test-element", "class"),
+    "updated-test-class",
+    "Class attribute for the test element is correct after update");
+  ok(testElement.getAttribute("class") !== "updated-test-class",
+    "Class attribute change on the inserted node does not change the original DOM node");
+
+  anonymousContent.removeAttributeForElement("test-element", "class");
+  is(anonymousContent.getAttributeForElement("test-element", "class"), null,
+    "Class attribute for the test element was removed");
+
+  let anim = anonymousContent.setAnimationForElement("test-element", [
+    { transform: 'translateY(0px)' },
+    { transform: 'translateY(-300px)' }
+  ], 2000);
+  is(anim.playState, "pending", "Animation should be running");
+  anim.cancel();
+  is(anim.playState, "idle", "Animation should have stopped immediately");
+
+  chromeDocument.removeAnonymousContent(anonymousContent);
+  </script>
+</body>
+</html>