diff --git a/editor/libeditor/tests/chrome.ini b/editor/libeditor/tests/chrome.ini
index b4546ea63f2d..241d4637c8b6 100644
--- a/editor/libeditor/tests/chrome.ini
+++ b/editor/libeditor/tests/chrome.ini
@@ -3,8 +3,6 @@ skip-if = buildapp == 'b2g' || os == 'android'
 support-files = green.png
 
 [test_bug489202.xul]
-[test_bug490879.xul]
-subsuite = clipboard
 [test_bug569988.html]
 skip-if = buildapp == 'mulet'
 [test_bug599983.xul]
diff --git a/editor/libeditor/tests/mochitest.ini b/editor/libeditor/tests/mochitest.ini
index 49036d1aa1f4..8d4fd1d04c59 100644
--- a/editor/libeditor/tests/mochitest.ini
+++ b/editor/libeditor/tests/mochitest.ini
@@ -60,6 +60,9 @@ skip-if = toolkit == 'android'
 [test_bug484181.html]
 skip-if = toolkit == 'android'
 [test_bug487524.html]
+[test_bug490879.html]
+subsuite = clipboard
+skip-if = toolkit == 'android' # bug 1299578
 [test_bug502673.html]
 [test_bug514156.html]
 [test_bug520189.html]
diff --git a/editor/libeditor/tests/test_bug490879.html b/editor/libeditor/tests/test_bug490879.html
new file mode 100644
index 000000000000..1e412a7d652a
--- /dev/null
+++ b/editor/libeditor/tests/test_bug490879.html
@@ -0,0 +1,45 @@
+<!doctype html>
+<title>Mozilla Bug 490879</title>
+<link rel=stylesheet href="/tests/SimpleTest/test.css">
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=490879"
+   target="_blank">Mozilla Bug 490879</a>
+<iframe id="i1" width="200" height="100" src="about:blank"></iframe>
+<img id="i" src="green.png">
+<script>
+function runTest() {
+  function verifyContent() {
+    const kExpectedImgSpec = "data:image/png;base64,";
+    var e = document.getElementById('i1');
+    var doc = e.contentDocument;
+    is(doc.getElementsByTagName("img")[0].src.substring(0, kExpectedImgSpec.length),
+       kExpectedImgSpec, "The pasted image is a base64-encoded data: URI");
+  }
+
+  function pasteInto() {
+    var e = document.getElementById('i1');
+    var doc = e.contentDocument;
+    doc.designMode = "on";
+    doc.defaultView.focus();
+    var selection = doc.defaultView.getSelection();
+    selection.removeAllRanges();
+    selection.selectAllChildren(doc.body);
+    selection.collapseToEnd();
+    SpecialPowers.doCommand(window, "cmd_paste");
+  }
+
+  function copyToClipBoard() {
+    SpecialPowers.setCommandNode(window, document.getElementById("i"));
+    SpecialPowers.doCommand(window, "cmd_copyImageContents");
+  }
+
+  copyToClipBoard();
+  pasteInto();
+  verifyContent();
+
+  SimpleTest.finish();
+}
+
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(runTest);
+</script>
diff --git a/editor/libeditor/tests/test_bug490879.xul b/editor/libeditor/tests/test_bug490879.xul
deleted file mode 100644
index 8081e81ec670..000000000000
--- a/editor/libeditor/tests/test_bug490879.xul
+++ /dev/null
@@ -1,71 +0,0 @@
-<?xml version="1.0"?>
-<?xml-stylesheet href="chrome://global/skin"
-                 type="text/css"?>
-<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css"
-                 type="text/css"?>
-<!--
-https://bugzilla.mozilla.org/show_bug.cgi?id=490879
--->
-<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
-        title="Mozilla Bug 490879" onload="runTest();">
-  <script type="application/javascript"
-          src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
-
-  <body xmlns="http://www.w3.org/1999/xhtml">
-  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=490879"
-     target="_blank">Mozilla Bug 490879</a>
-  <p/>
-  <iframe id="i1" width="200" height="100" src="about:blank" /><br />
-  <img id="i" src="green.png" />
-  <p/>
-  <pre id="test">
-  </pre>
-  </body>
-  <script class="testbody" type="application/javascript">
-  <![CDATA[
-
-function runTest() {
-  function verifyContent() {
-    const kExpectedImgSpec = "data:image/png;base64,";
-    var e = document.getElementById('i1');
-    var doc = e.contentDocument;
-    is(doc.getElementsByTagName("img")[0].src.substring(0, kExpectedImgSpec.length),
-       kExpectedImgSpec, "The pasted image is a base64-encoded data: URI");
-  }
-
-  function pasteInto() {
-    var e = document.getElementById('i1');
-    var doc = e.contentDocument;
-    doc.designMode = "on";
-    doc.defaultView.focus();
-    var selection = doc.defaultView.getSelection();
-    selection.removeAllRanges();
-    selection.selectAllChildren(doc.body);
-    selection.collapseToEnd();
-    doc.execCommand("paste", false, null);
-  }
-
-  function copyToClipBoard() {
-    var tmpNode = document.popupNode;
-    document.popupNode = document.getElementById("i");
-
-    const kCmd = "cmd_copyImageContents";
-    var controller = top.document.commandDispatcher
-                     .getControllerForCommand(kCmd);
-    ok((controller && controller.isCommandEnabled(kCmd)), "have copy command");
-    controller.doCommand(kCmd);
-
-    document.popupNode = tmpNode;
-  }
-
-  copyToClipBoard();
-  pasteInto();
-  verifyContent();
-
-  SimpleTest.finish();
-}
-
-SimpleTest.waitForExplicitFinish();
-]]>
-</script>
-</window>
