diff --git a/accessible/src/html/nsHyperTextAccessible.cpp b/accessible/src/html/nsHyperTextAccessible.cpp
index 3846dfd87ee8..371701cb2ef6 100644
--- a/accessible/src/html/nsHyperTextAccessible.cpp
+++ b/accessible/src/html/nsHyperTextAccessible.cpp
@@ -735,6 +735,30 @@ nsHyperTextAccessible::HypertextOffsetsToDOMRange(PRInt32 aStartHTOffset,
   NS_ENSURE_ARG_POINTER(aEndOffset);
   *aEndOffset = -1;
 
+  // If the given offsets are 0 and associated editor is empty then return
+  // collapsed range with editor root element as range container.
+  if (aStartHTOffset == 0 && aEndHTOffset == 0) {
+    nsCOMPtr<nsIEditor> editor;
+    GetAssociatedEditor(getter_AddRefs(editor));
+    if (editor) {
+      PRBool isEmpty = PR_FALSE;
+      editor->GetDocumentIsEmpty(&isEmpty);
+      if (isEmpty) {
+        nsCOMPtr<nsIDOMElement> editorRootElm;
+        editor->GetRootElement(getter_AddRefs(editorRootElm));
+
+        nsCOMPtr<nsIDOMNode> editorRoot(do_QueryInterface(editorRootElm));
+        if (editorRoot) {
+          *aStartOffset = *aEndOffset = 0;
+          NS_ADDREF(*aStartNode = editorRoot);
+          NS_ADDREF(*aEndNode = editorRoot);
+
+          return NS_OK;
+        }
+      }
+    }
+  }
+
   nsCOMPtr<nsIAccessible> startAcc, endAcc;
   PRInt32 startOffset = aStartHTOffset, endOffset = aEndHTOffset;
   nsIFrame *startFrame = nsnull, *endFrame = nsnull;
diff --git a/accessible/tests/mochitest/Makefile.in b/accessible/tests/mochitest/Makefile.in
index 716e74f688f2..1d48dd75b11f 100644
--- a/accessible/tests/mochitest/Makefile.in
+++ b/accessible/tests/mochitest/Makefile.in
@@ -48,9 +48,11 @@ include $(topsrcdir)/config/rules.mk
 _TEST_FILES =\
 		moz.png \
 		longdesc_src.html \
+		common.js \
 		nsIAccessible_actions.js \
 		nsIAccessible_name.css \
 		nsIAccessible_name.xbl \
+		nsIAccessibleEditableText.js \
 		test_aria_activedescendant.html \
 		test_aria_role_article.html \
 		test_bug368835.xul \
@@ -62,16 +64,17 @@ _TEST_FILES =\
 		test_nsIAccessible_actions.xul \
 		test_nsIAccessible_name.html \
 		test_nsIAccessible_name.xul \
+		test_nsIAccessibleDocument.html \
+		test_nsIAccessibleEditableText.html \
+		test_nsIAccessibleHyperLink.html \
+		test_nsIAccessibleHyperLink.xul \
+		test_nsIAccessibleHyperText.html \
+		test_nsIAccessibleImage.html \
 		test_nsIAccessibleTable_1.html \
 		test_nsIAccessibleTable_2.html \
 		test_nsIAccessibleTable_3.html \
 		test_nsIAccessibleTable_4.html \
 		test_nsIAccessibleTable_listboxes.xul \
-		test_nsIAccessibleDocument.html \
-		test_nsIAccessibleHyperLink.html \
-		test_nsIAccessibleHyperLink.xul \
-		test_nsIAccessibleHyperText.html \
-		test_nsIAccessibleImage.html \
 		test_nsOuterDocAccessible.html \
 		test_textattrs.html \
 		test_textboxes.html \
diff --git a/accessible/tests/mochitest/common.js b/accessible/tests/mochitest/common.js
new file mode 100644
index 000000000000..2c08774fb127
--- /dev/null
+++ b/accessible/tests/mochitest/common.js
@@ -0,0 +1,118 @@
+////////////////////////////////////////////////////////////////////////////////
+// Interfaces
+
+const nsIAccessibleRetrieval = Components.interfaces.nsIAccessibleRetrieval;
+
+const nsIAccessibleEvent = Components.interfaces.nsIAccessibleEvent;
+const nsIAccessibleStates = Components.interfaces.nsIAccessibleStates;
+const nsIAccessibleRole = Components.interfaces.nsIAccessibleRole;
+const nsIAccessibleTypes = Components.interfaces.nsIAccessibleTypes;
+
+const nsIAccessibleRelation = Components.interfaces.nsIAccessibleRelation;
+
+const nsIAccessNode = Components.interfaces.nsIAccessNode;
+const nsIAccessible = Components.interfaces.nsIAccessible;
+
+const nsIAccessibleDocument = Components.interfaces.nsIAccessibleDocument;
+
+const nsIAccessibleText = Components.interfaces.nsIAccessibleText;
+const nsIAccessibleEditableText = Components.interfaces.nsIAccessibleEditableText;
+
+const nsIAccessibleHyperLink = Components.interfaces.nsIAccessibleHyperLink;
+const nsIAccessibleHyperText = Components.interfaces.nsIAccessibleHyperText;
+
+const nsIAccessibleImage = Components.interfaces.nsIAccessibleImage;
+const nsIAccessibleSelectable = Components.interfaces.nsIAccessibleSelectable;
+const nsIAccessibleTable = Components.interfaces.nsIAccessibleTable;
+const nsIAccessibleValue = Components.interfaces.nsIAccessibleValue;
+
+const nsIObserverService = Components.interfaces.nsIObserverService;
+
+const nsIDOMNode = Components.interfaces.nsIDOMNode;
+
+////////////////////////////////////////////////////////////////////////////////
+// General
+
+/**
+ * nsIAccessibleRetrieval, initialized when test is loaded.
+ */
+var gAccRetrieval = null;
+
+/**
+ * Return accessible for the given ID attribute or DOM element.
+ *
+ * @param aElmOrID     [in] the ID attribute or DOM element to get an accessible
+ *                     for
+ * @param aInterfaces  [in, optional] the accessible interface or the array of
+ *                     accessible interfaces to query it/them from obtained
+ *                     accessible
+ * @param aElmObj      [out, optional] object to store DOM element which
+ *                     accessible is created for
+ */
+function getAccessible(aElmOrID, aInterfaces, aElmObj)
+{
+  var elm = null;
+
+  if (aElmOrID instanceof nsIDOMNode) {
+    elm = aElmOrID;
+  } else {
+    var elm = document.getElementById(aElmOrID);
+    if (!elm) {
+      ok(false, "Can't get DOM element for " + aID);
+      return null;
+    }
+  }
+
+  if (aElmObj && (typeof aElmObj == "object"))
+    aElmObj.value = elm;
+
+  var acc = null;
+  try {
+    acc = gAccRetrieval.getAccessibleFor(elm);
+  } catch (e) {
+  }
+  
+  if (!acc) {
+    ok(false, "Can't get accessible for " + aID);
+    return null;
+  }
+  
+  if (!aInterfaces)
+    return acc;
+  
+  if (aInterfaces instanceof Array) {
+    for (var index = 0; index < aInterfaces.length; index++) {
+      try {
+        acc.QueryInterface(aInterfaces[index]);
+      } catch (e) {
+        ok(false, "Can't query " + aInterfaces[index] + " for " + aID);
+        return null;
+      }
+    }
+    return acc;
+  }
+  
+  try {
+    acc.QueryInterface(aInterfaces);
+  } catch (e) {
+    ok(false, "Can't query " + aInterfaces + " for " + aID);
+    return null;
+  }
+  
+  return acc;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Private
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+// General
+
+function initialize()
+{
+  gAccRetrieval = Components.classes["@mozilla.org/accessibleRetrieval;1"].
+  getService(nsIAccessibleRetrieval);
+}
+
+addLoadEvent(initialize);
diff --git a/accessible/tests/mochitest/nsIAccessibleEditableText.js b/accessible/tests/mochitest/nsIAccessibleEditableText.js
new file mode 100644
index 000000000000..52ea3d4fab0d
--- /dev/null
+++ b/accessible/tests/mochitest/nsIAccessibleEditableText.js
@@ -0,0 +1,105 @@
+function nsEditableText(aElmOrID)
+{
+  this.setTextContents = function setTextContents(aStr)
+  {
+    try {
+      this.mAcc.setTextContents(aStr);
+      
+      is(this.getValue(), aStr,
+         "setTextContents: Can't set " + aStr +
+         " to element with ID '" + this.mID + "'");
+    } catch (e) {
+      ok(false,
+         "setTextContents: Can't set " + aStr +
+         "to element with ID '" + this.mID +
+         "', value '" + this.getValue() + "', exception" + e);
+    }
+  }
+  
+  this.insertText = function insertText(aStr, aPos, aResStr)
+  {
+    try {
+      this.mAcc.insertText(aStr, aPos);
+      
+      is(this.getValue(), aResStr,
+         "insertText: Can't insert " + aStr + " at " + aPos +
+         " to element with ID '" + this.mID + "'");
+    } catch (e) {
+      ok(false,
+         "insertText: Can't insert " + aStr + " at " + aPos +
+         " to element with ID '" + this.mID +
+         "', value '" + this.getValue() + "', exception " + e);
+    }
+  }
+  
+  this.copyNPasteText = function copyNPasteText(aStartPos, aEndPos,
+                                                aPos, aResStr)
+  {
+    try {
+      this.mAcc.copyText(aStartPos, aEndPos);
+      this.mAcc.pasteText(aPos);
+      
+      is(this.getValue(), aResStr,
+         "copyText & pasteText: Can't copy text from " + aStartPos +
+         " to " + aEndPos + " and paste to " + aPos +
+         " for element with ID '" + this.mID + "'");
+    } catch (e) {
+      ok(false,
+         "copyText & pasteText: Can't copy text from " + aStartPos +
+         " to " + aEndPos + " and paste to " + aPos +
+         " for element with ID '" + this.mID +
+         "', value '" + this.getValue() + "', exception " + e);
+    }
+  }
+  
+  this.cutNPasteText = function copyNPasteText(aStartPos, aEndPos,
+                                               aPos, aResStr)
+  {
+    try {
+      this.mAcc.cutText(aStartPos, aEndPos);
+      this.mAcc.pasteText(aPos);
+      
+      is(this.getValue(), aResStr,
+         "cutText & pasteText: Can't cut text from " + aStartPos +
+         " to " + aEndPos + " and paste to " + aPos +
+         " for element with ID '" + this.mID + "'");
+    } catch (e) {
+      ok(false,
+         "cutText & pasteText: Can't cut text from " + aStartPos +
+         " to " + aEndPos + " and paste to " + aPos +
+         " for element with ID '" + this.mID +
+         "', value '" + this.getValue() + "', exception " + e);
+    }
+  }
+  
+  this.deleteText = function deleteText(aStartPos, aEndPos, aResStr)
+  {
+    try {
+      this.mAcc.deleteText(aStartPos, aEndPos);
+      
+      is(this.getValue(), aResStr,
+         "deleteText: Can't delete text from " + aStartPos +
+         " to " + aEndPos + " for element with ID '" + this.mID + "'");
+    } catch (e) {
+      ok(false,
+         "deleteText: Can't delete text from " + aStartPos +
+         " to " + aEndPos + " for element with ID '" + this.mID +
+         "', value " + this.getValue() + ", exception " + e);
+    }
+  }
+
+  this.getValue = function getValue()
+  {
+    if (this.mElm instanceof Components.interfaces.nsIDOMNSEditableElement)
+      return this.mElm.value;
+    if (this.mElm instanceof Components.interfaces.nsIDOMHTMLDocument)
+      return this.mElm.body.textContent;
+    return this.mElm.textContent;
+  }
+
+  var elmObj = { value: null };
+  this.mAcc = getAccessible(aElmOrID, nsIAccessibleEditableText, elmObj);
+
+  this.mElm = elmObj.value;
+  this.mID = aElmOrID;
+}
diff --git a/accessible/tests/mochitest/test_nsIAccessibleEditableText.html b/accessible/tests/mochitest/test_nsIAccessibleEditableText.html
new file mode 100644
index 000000000000..d5c69f317bdf
--- /dev/null
+++ b/accessible/tests/mochitest/test_nsIAccessibleEditableText.html
@@ -0,0 +1,95 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=452161
+-->
+<head>
+  <title>nsIAccessibleEditableText chrome tests</title>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script type="application/javascript"
+          src="chrome://mochikit/content/MochiKit/packed.js"></script>
+  <script type="application/javascript"
+          src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript"
+          src="chrome://mochikit/content/a11y/accessible/common.js"></script>
+  <script type="application/javascript"
+          src="chrome://mochikit/content/a11y/accessible/nsIAccessibleEditableText.js"></script>
+
+  <script type="application/javascript">
+    var gParagraphAcc;
+
+    function testEditable(aID)
+    {
+      var et = new nsEditableText(aID);
+
+      //////////////////////////////////////////////////////////////////////////
+      // insertText
+      et.insertText("hello", 0, "hello");
+      et.insertText("ma ", 0, "ma hello");
+      et.insertText("ma", 2, "mama hello");
+      et.insertText(" hello", 10, "mama hello hello");
+
+      // XXX: bug 452584
+
+      //////////////////////////////////////////////////////////////////////////
+      // setTextContents
+//      et.setTextContents("hello", "hello");
+//      et.setTextContents("olleh", "olleh");
+//      et.setTextContents("", "");
+
+      //////////////////////////////////////////////////////////////////////////
+      // deleteText
+//      et.deleteText(0, 5, "hello hello");
+//      et.deleteText(5, 6, "hellohello");
+//      et.deleteText(5, 10, "hello");
+//      et.deleteText(0, 5, "");
+
+      //////////////////////////////////////////////////////////////////////////
+      // copyNPasteText
+//      et.copyNPasteText(0, 0, 0, "");
+//      et.insertText("hello", 0, "hello");
+//      et.copyNPasteText(0, 1, 0, "hhello");
+//      et.copyNPasteText(5, 6, 6, "hhelloo");
+//      et.copyNPasteText(3, 4, 1, "hehelloo");
+
+      //////////////////////////////////////////////////////////////////////////
+//      // cutNPasteText
+//      et.cutNPasteText(0, 1, 1, "ehhelloo");
+//      et.cutNPasteText(1, 2, 0, "hehelloo");
+//      et.cutNPasteText(7, 8, 8, "hehelloo");
+    }
+
+    function doTest()
+    {
+      testEditable("input");
+      // testEditable("div"); XXX: bug 452599
+
+      var frame = document.getElementById("frame");
+      frame.contentDocument.designMode = "on";
+      testEditable(frame.contentDocument);
+      
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addLoadEvent(doTest);
+  </script>
+</head>
+<body>
+
+  <a target="_blank"
+     title="nsIAccessibleEditableText chrome tests"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=452161">Mozilla Bug 452161</a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <input id="input"/>
+
+  <div id="div" contentEditable="true"/>
+
+  <iframe id="frame"/>
+</body>
+</html>