diff --git a/profile/resources/content/confirmMigration.js b/profile/resources/content/confirmMigration.js
new file mode 100644
index 000000000000..30fd332217be
--- /dev/null
+++ b/profile/resources/content/confirmMigration.js
@@ -0,0 +1,18 @@
+var profile = Components.classes["component://netscape/profile/manager"].getService();
+profile = profile.QueryInterface(Components.interfaces.nsIProfile);
+
+function handleOKButton()
+{
+	profile.automigrate = true;
+	return true;
+}
+function handleCancelButton()
+{
+	profile.automigrate = false;
+	return true;
+}
+
+function onLoad()
+{
+	doSetOKCancel(handleOKButton, handleCancelButton);
+}
diff --git a/profile/resources/content/confirmMigration.xul b/profile/resources/content/confirmMigration.xul
new file mode 100644
index 000000000000..0cd6080de00c
--- /dev/null
+++ b/profile/resources/content/confirmMigration.xul
@@ -0,0 +1,35 @@
+<?xml version="1.0"?> 
+
+
+<?xml-stylesheet href="chrome://profile/skin/" type="text/css"?>
+<?xul-overlay href="chrome://global/content/dialogOverlay.xul"?>
+
+<!DOCTYPE window SYSTEM "chrome://profile/locale/confirmMigration.dtd" >
+
+<window
+	xmlns:html="http://www.w3.org/TR/REC-html40"
+	xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" 
+	align="vertical"
+	title="&window.title;"
+	onload="onLoad()"
+	class="dialog"> 
+
+<html:script language="javascript" src="chrome://profile/content/confirmMigration.js"/> 
+    
+    <box align="horizontal" flex="100%">
+    	<box align="vertical" flex="100%">
+		<html:div>
+		&confirmMigrationPart1.label;
+		</html:div>
+		<html:div>
+		&confirmMigrationPart2.label;
+		</html:div>
+		<html:div>
+		&confirmMigrationPart3.label;
+		</html:div>
+	</box>
+    </box>
+
+    <box id="okCancelButtons"/>
+	
+</window>
diff --git a/profile/resources/locale/en-US/confirmMigration.dtd b/profile/resources/locale/en-US/confirmMigration.dtd
new file mode 100644
index 000000000000..34560d4f7e88
--- /dev/null
+++ b/profile/resources/locale/en-US/confirmMigration.dtd
@@ -0,0 +1,4 @@
+<!ENTITY window.title "Confirm Migration">
+<!ENTITY confirmMigrationPart1.label "You are about to migrate your 4.x profile.">
+<!ENTITY confirmMigrationPart2.label "Are you sure you want to do this?">
+<!ENTITY confirmMigrationPart3.label "(If you click no, you can always do it later.)">