diff --git a/editor/libeditor/text/nsPlaintextDataTransfer.cpp b/editor/libeditor/text/nsPlaintextDataTransfer.cpp
index 0b6c79564d6d..209c08f575a0 100644
--- a/editor/libeditor/text/nsPlaintextDataTransfer.cpp
+++ b/editor/libeditor/text/nsPlaintextDataTransfer.cpp
@@ -68,6 +68,7 @@
 #include "nsISelectionPrivate.h"
 #include "nsFrameSelection.h"
 #include "nsEventDispatcher.h"
+#include "nsContentUtils.h"
 
 NS_IMETHODIMP nsPlaintextEditor::PrepareTransferable(nsITransferable **transferable)
 {
@@ -136,6 +137,10 @@ NS_IMETHODIMP nsPlaintextEditor::InsertTextFromTransferable(nsITransferable *aTr
       nsAutoString stuffToPaste;
       textDataObj->GetData(stuffToPaste);
       NS_ASSERTION(stuffToPaste.Length() <= (len/2), "Invalid length!");
+
+      // Sanitize possible carriage returns in the string to be inserted
+      nsContentUtils::PlatformToDOMLineBreaks(stuffToPaste);
+
       nsAutoEditBatch beginBatching(this);
       rv = InsertTextAt(stuffToPaste, aDestinationNode, aDestOffset, aDoDeleteSelection);
     }
diff --git a/editor/libeditor/text/tests/Makefile.in b/editor/libeditor/text/tests/Makefile.in
index 4572909aac55..ac9980328c26 100644
--- a/editor/libeditor/text/tests/Makefile.in
+++ b/editor/libeditor/text/tests/Makefile.in
@@ -63,6 +63,7 @@ _TEST_FILES = \
 		test_bug638596.html \
 		test_bug641466.html \
 		test_bug645914.html \
+		test_bug681229.html \
 		$(NULL)
 
 # disables the key handling test on gtk2 because gtk2 overrides some key events
diff --git a/editor/libeditor/text/tests/test_bug681229.html b/editor/libeditor/text/tests/test_bug681229.html
new file mode 100644
index 000000000000..05710e4eb164
--- /dev/null
+++ b/editor/libeditor/text/tests/test_bug681229.html
@@ -0,0 +1,51 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=681229
+-->
+<head>
+  <title>Test for Bug 681229</title>
+  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.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=681229">Mozilla Bug 681229</a>
+<p id="display"></p>
+<div id="content">
+<textarea spellcheck="false"></textarea>
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 681229 **/
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.waitForFocus(function() {
+  var t = document.querySelector("textarea");
+  t.focus();
+
+  const kValue = "a\r\nb";
+  const kExpectedValue = (navigator.platform.indexOf("Win") == 0) ?
+    "a\nb" : kValue;
+
+  SimpleTest.waitForClipboard(kExpectedValue,
+    function() {
+      SpecialPowers.copyString(kValue);
+    },
+    function() {
+      synthesizeKey("V", {accelKey: true});
+      is(t.value, "a\nb", "The carriage return has been correctly sanitized");
+      SimpleTest.finish();
+    },
+    function() {
+      SimpleTest.finish();
+    }
+  );
+});
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/testing/mochitest/specialpowers/content/specialpowers.js b/testing/mochitest/specialpowers/content/specialpowers.js
index 89c260fe26cc..7b4c141d6b62 100644
--- a/testing/mochitest/specialpowers/content/specialpowers.js
+++ b/testing/mochitest/specialpowers/content/specialpowers.js
@@ -418,6 +418,12 @@ SpecialPowers.prototype = {
   getDocumentURIObject: function(aDocument) {
       return aDocument.documentURIObject;
   },
+
+  copyString: function(str) {
+    Cc["@mozilla.org/widget/clipboardhelper;1"].
+      getService(Ci.nsIClipboardHelper).
+      copyString(str);
+  },
 };
 
 // Expose everything but internal APIs (starting with underscores) to
