diff --git a/extensions/layout-debug/src/nsILayoutRegressionTester.idl b/extensions/layout-debug/src/nsILayoutRegressionTester.idl
index d3492e23ca2..f14568d79d9 100644
--- a/extensions/layout-debug/src/nsILayoutRegressionTester.idl
+++ b/extensions/layout-debug/src/nsILayoutRegressionTester.idl
@@ -42,7 +42,7 @@
 interface nsIDOMWindow;
 interface nsILocalFile;
 
-[scriptable, uuid(1B4CD090-0531-11d6-A876-00105A183419)]
+[scriptable, uuid(B249B2C0-EE11-11DA-8AD9-0800200C9A66)]
 interface nsILayoutRegressionTester : nsISupports
 {
   /**
@@ -57,6 +57,7 @@ interface nsILayoutRegressionTester : nsISupports
    */
   const short DUMP_FLAGS_MASK_DEFAULT        = 0;
   const short DUMP_FLAGS_MASK_DUMP_STYLE     = 1;
+  const short DUMP_FLAGS_MASK_PRINT_MODE     = 2;
   
   const long DUMP_RESULT_COMPLETED           = 0;   // loaded OK
   const long DUMP_RESULT_LOADING             = 1;   // still loading
diff --git a/extensions/layout-debug/src/nsRegressionTester.cpp b/extensions/layout-debug/src/nsRegressionTester.cpp
index 4b5f2172195..c20dca2b9ad 100644
--- a/extensions/layout-debug/src/nsRegressionTester.cpp
+++ b/extensions/layout-debug/src/nsRegressionTester.cpp
@@ -53,6 +53,8 @@
 #include "nsIDOMHTMLDocument.h"
 #include "nsISimpleEnumerator.h"
 #include "nsIDocShell.h"
+#include "nsIContentViewer.h"
+#include "nsIContentViewerFile.h"
 #include "nsIFrameDebug.h"
 #include "nsIFrame.h"
 #include "nsStyleStruct.h"
@@ -121,11 +123,21 @@ nsRegressionTester::DumpFrameModel(nsIDOMWindow *aWindowToDump, nsILocalFile *aD
     rv = aDestFile->OpenANSIFileDesc("w", &fp);
     if (NS_FAILED(rv)) return rv;
   }
-  
-  fdbg->DumpRegressionData(presShell->GetPresContext(), fp, 0, dumpStyle);
+  if (aFlagsMask & DUMP_FLAGS_MASK_PRINT_MODE) {
+    nsCOMPtr <nsIContentViewer> viewer;
+    docShell->GetContentViewer(getter_AddRefs(viewer));
+    if (viewer){
+      nsCOMPtr<nsIContentViewerFile> viewerFile = do_QueryInterface(viewer);
+      if (viewerFile) {
+         viewerFile->Print(PR_TRUE, fp, nsnull);
+      }
+    }
+  }
+  else {
+    fdbg->DumpRegressionData(presShell->GetPresContext(), fp, 0, dumpStyle);
+  }
   if (fp != stdout)
     fclose(fp);
-
   *aResult = DUMP_RESULT_COMPLETED;
   return NS_OK;
 }
diff --git a/extensions/layout-debug/ui/content/layoutdebug.js b/extensions/layout-debug/ui/content/layoutdebug.js
index b6f8400b9b6..e1e2136989f 100644
--- a/extensions/layout-debug/ui/content/layoutdebug.js
+++ b/extensions/layout-debug/ui/content/layoutdebug.js
@@ -343,31 +343,32 @@ const NS_LOCALFILEINPUTSTREAM_CONTRACTID =
           "@mozilla.org/network/file-input-stream;1";
 
 
-function RunRTest(aFilename, aIsBaseline)
+function RunRTest(aFilename, aIsBaseline, aIsPrinting)
 {
   if (gRTestURLList) {
     // XXX Does alert work?
     alert("Already running regression test.\n");
     return;
   }
-
-  dump("Running " + (aIsBaseline?"baseline":"verify") + " test for " + aFilename + ".\n");
+  dump("Running " + (aIsBaseline?"baseline":"verify") + 
+      (aIsPrinting?" PrintMode":"") + " test for " + aFilename + ".\n");
 
   var listFile = Components.classes[NS_LOCAL_FILE_CONTRACTID].
                     createInstance(nsILocalFile);
   listFile.persistentDescriptor = aFilename;
-  gRTestURLList = new RTestURLList(listFile, aIsBaseline);
+  gRTestURLList = new RTestURLList(listFile, aIsBaseline, aIsPrinting);
   gRTestURLList.startURL();
 }
 
-function RTestURLList(aLocalFile, aIsBaseline) {
-  this.init(aLocalFile, aIsBaseline);
+function RTestURLList(aLocalFile, aIsBaseline, aIsPrinting) {
+  this.init(aLocalFile, aIsBaseline, aIsPrinting);
 }
 
 RTestURLList.prototype = {
-  init : function(aLocalFile, aIsBaseline)
+  init : function(aLocalFile, aIsBaseline, aIsPrinting)
     {
       this.mIsBaseline = aIsBaseline;
+      this.mIsPrinting = aIsPrinting;
       this.mURLs = new Array();
       this.readFileList(aLocalFile);
       this.mRegressionTester =
@@ -419,8 +420,16 @@ RTestURLList.prototype = {
 
     dump("Writing regression data to " +
          data.QueryInterface(nsILocalFile).persistentDescriptor + "\n");
-    this.mRegressionTester.dumpFrameModel(gBrowser.contentWindow, data,
-      nsILayoutRegressionTester.DUMP_FLAGS_MASK_DUMP_STYLE);
+    if (this.mIsPrinting) {
+      this.mRegressionTester.dumpFrameModel(gBrowser.contentWindow, data,
+        nsILayoutRegressionTester.DUMP_FLAGS_MASK_PRINT_MODE);
+    }
+    else {
+       this.mRegressionTester.dumpFrameModel(gBrowser.contentWindow, data,
+        nsILayoutRegressionTester.DUMP_FLAGS_MASK_DUMP_STYLE);
+    }
+     
+      
 
     if (!this.mIsBaseline) {
       var base_data = this.mCurrentURL.dir.clone();
@@ -454,5 +463,6 @@ RTestURLList.prototype = {
   mURLs : null,
   mCurrentURL : null, // url (string), dir (nsIFileURL), relurl (string)
   mIsBaseline : null,
-  mRegressionTester : null
+  mRegressionTester : null,
+  mIsPrinting : null
 }
diff --git a/extensions/layout-debug/ui/content/layoutdebug.xul b/extensions/layout-debug/ui/content/layoutdebug.xul
index bc368cba9a9..f84b3ecee1f 100644
--- a/extensions/layout-debug/ui/content/layoutdebug.xul
+++ b/extensions/layout-debug/ui/content/layoutdebug.xul
@@ -97,13 +97,13 @@
 
     <toolbox>
       <menubar id="main-menubar" grippyhidden="true">
-        <menu id="menu_File">
+        <menu id="menu_file" label="File" accesskey="F">
           <menupopup id="menu_FilePopup">
             <menuitem id="menu_open" label="&ldb.Open.label;" accesskey="&ldb.Open.accesskey;" key="openFileKb" oncommand="openFile()"/>
-            <menuitem id="menu_close"/>
+            <menuitem id="menu_close" label="Close" accesskey="C" oncommand="window.close();"/>
           </menupopup>
         </menu>
-        <menu id="menu_Edit">
+        <menu id="menu_edit">
           <menupopup>
             <menuitem id="menu_cut" />
             <menuitem id="menu_copy" />
@@ -115,6 +115,7 @@
         <menu label="&ldb.RegressionTestMenu.label;"
               accesskey="&ldb.RegressionTestMenu.accesskey;">
           <menupopup>
+			<menuitem type="checkbox" id="menu_RTestPrintMode" label="&ldb.RegressionPrintMode.label;" accesskey="&ldb.RegressionPrintMode.accesskey;"/>
             <menu label="&ldb.RunBaselineMenu.label;"
                   accesskey="&ldb.RunBaselineMenu.accesskey;"
                   id="menu_RTest_baseline"
@@ -126,7 +127,7 @@
                   <menuitem uri="rdf:*"
                             label="rdf:&NC_RDFNS;name"
                             name="rdf:&NC_RDFNS;name"
-                            oncommand="RunRTest(this.getAttribute('name'), true);" />
+                            oncommand="RunRTest(this.getAttribute('name'), true, document.getElementById('menu_RTestPrintMode').getAttribute('checked'));" />
                 </menupopup>
               </template>
             </menu>
@@ -141,7 +142,7 @@
                   <menuitem uri="rdf:*"
                             label="rdf:&NC_RDFNS;name"
                             name="rdf:&NC_RDFNS;name"
-                            oncommand="RunRTest(this.getAttribute('name'), false);" />
+                            oncommand="RunRTest(this.getAttribute('name'), false, document.getElementById('menu_RTestPrintMode').getAttribute('checked'));" />
                 </menupopup>
               </template>
             </menu>
@@ -221,7 +222,7 @@
     </toolbox>
 
     <browser flex="1" id="browser" type="content-primary"
-             homepage="resource:///res/samples/test0.html" />
+             homepage="about:blank" />
 
     <hbox>
       <description id="status-text" value="" />
diff --git a/extensions/layout-debug/ui/locale/en-US/layoutdebug.dtd b/extensions/layout-debug/ui/locale/en-US/layoutdebug.dtd
index f7f34200695..a2503a2f9a5 100644
--- a/extensions/layout-debug/ui/locale/en-US/layoutdebug.dtd
+++ b/extensions/layout-debug/ui/locale/en-US/layoutdebug.dtd
@@ -61,6 +61,8 @@
 <!ENTITY ldb.RunBaselineMenu.accesskey "B">
 <!ENTITY ldb.RunVerifyMenu.label "Run Verify">
 <!ENTITY ldb.RunVerifyMenu.accesskey "V">
+<!ENTITY ldb.RegressionPrintMode.label "Print Mode">
+<!ENTITY ldb.RegressionPrintMode.accesskey "P">
 <!ENTITY ldb.AddNewList.label "Add New List...">
 <!ENTITY ldb.AddNewList.accesskey "A">
 <!ENTITY ldb.RemoveListMenu.label "Remove List">