diff --git a/mozilla/toolkit/components/printing/content/printUtils.js b/mozilla/toolkit/components/printing/content/printUtils.js
index 05de039f087..d1627ea8f57 100644
--- a/mozilla/toolkit/components/printing/content/printUtils.js
+++ b/mozilla/toolkit/components/printing/content/printUtils.js
@@ -39,6 +39,8 @@
 #
 # ***** END LICENSE BLOCK ***** */
 
+var  XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
+
 var PrintUtils = {
 
   showPageSetup: function ()
@@ -213,8 +215,10 @@ var PrintUtils = {
     getBrowser().parentNode.insertBefore(printPreviewTB, getBrowser());
 
     // Tab browser...
-    this._chromeState.hadTabStrip = getBrowser().getStripVisibility();
-    getBrowser().setStripVisibilityTo(false);
+    if ("getStripVisibility" in getBrowser()) {
+      this._chromeState.hadTabStrip = getBrowser().getStripVisibility();
+      getBrowser().setStripVisibilityTo(false);
+    }
 
     // disable chrome shortcuts...
     window.addEventListener("keypress", this.onKeyPressPP, true);
@@ -230,7 +234,8 @@ var PrintUtils = {
   {
     window.removeEventListener("keypress", this.onKeyPressPP, true);
 
-    getBrowser().setStripVisibilityTo(this._chromeState.hadTabStrip);
+    if ("getStripVisibility" in getBrowser())
+      getBrowser().setStripVisibilityTo(this._chromeState.hadTabStrip);
     var webBrowserPrint = this.getWebBrowserPrint();
     webBrowserPrint.exitPrintPreview(); 
 
diff --git a/mozilla/toolkit/components/viewsource/content/viewPartialSource.xul b/mozilla/toolkit/components/viewsource/content/viewPartialSource.xul
index 88766b51db2..0d02be81a22 100644
--- a/mozilla/toolkit/components/viewsource/content/viewPartialSource.xul
+++ b/mozilla/toolkit/components/viewsource/content/viewPartialSource.xul
@@ -40,6 +40,7 @@
 #***** END LICENSE BLOCK ***** -->
 
 <?xml-stylesheet href="chrome://global/skin/" type="text/css"?> 
+<?xml-stylesheet href="chrome://global/content/viewSource.css" type="text/css"?> 
 <?xul-overlay href="chrome://global/content/editMenuOverlay.xul"?>
 <?xul-overlay href="chrome://global/content/charsetOverlay.xul"?>
 
@@ -73,6 +74,7 @@
 
   <command id="cmd_savePage" disabled="true" oncommand="ViewSourceSavePage();"/>
   <command id="cmd_print" oncommand="PrintUtils.print();"/>
+  <command id="cmd_printpreview" oncommand="PrintUtils.printPreview(onEnterPP, onExitPP);"/>
   <command id="cmd_pagesetup" oncommand="PrintUtils.showPageSetup();"/>
   <command id="cmd_close" oncommand="window.close();"/>
   <commandset id="editMenuCommands"/>
@@ -106,6 +108,8 @@
                     label="&savePageCmd.label;" accesskey="&savePageCmd.accesskey;"/>
           <menuitem command="cmd_pagesetup"
                     label="&pageSetupCmd.label;" accesskey="&pageSetupCmd.accesskey;"/>
+          <menuitem command="cmd_printpreview"
+                    label="&printPreviewCmd.label;" accesskey="&printPreviewCmd.accesskey;"/>
           <menuitem key="key_print" command="cmd_print"
                     label="&printCmd.label;" accesskey="&printCmd.accesskey;"/>
           <menuseparator/>
diff --git a/mozilla/toolkit/components/viewsource/content/viewSource.css b/mozilla/toolkit/components/viewsource/content/viewSource.css
new file mode 100644
index 00000000000..62cadb9c6fb
--- /dev/null
+++ b/mozilla/toolkit/components/viewsource/content/viewSource.css
@@ -0,0 +1,3 @@
+toolbar[printpreview="true"] {
+  -moz-binding: url("chrome://global/content/printPreviewBindings.xml#printpreviewtoolbar");
+}
diff --git a/mozilla/toolkit/components/viewsource/content/viewSource.js b/mozilla/toolkit/components/viewsource/content/viewSource.js
index 310988eca17..451dc54ed60 100644
--- a/mozilla/toolkit/components/viewsource/content/viewSource.js
+++ b/mozilla/toolkit/components/viewsource/content/viewSource.js
@@ -233,6 +233,18 @@ function ViewSourceSavePage()
   saveURL(window.content.location.href.substring(12), null, "SaveLinkTitle");
 }
 
+function onEnterPP()
+{
+  var toolbox = document.getElementById("viewSource-toolbox");
+  toolbox.hidden = true;
+}
+
+function onExitPP()
+{
+  var toolbox = document.getElementById("viewSource-toolbox");
+  toolbox.hidden = false;
+}
+
 function ViewSourceGoToLine()
 {
   var promptService = Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
diff --git a/mozilla/toolkit/components/viewsource/content/viewSource.xul b/mozilla/toolkit/components/viewsource/content/viewSource.xul
index b002639a5fd..79ebed79dd0 100644
--- a/mozilla/toolkit/components/viewsource/content/viewSource.xul
+++ b/mozilla/toolkit/components/viewsource/content/viewSource.xul
@@ -40,6 +40,7 @@
 #***** END LICENSE BLOCK ***** -->
 
 <?xml-stylesheet href="chrome://global/skin/" type="text/css"?> 
+<?xml-stylesheet href="chrome://global/content/viewSource.css" type="text/css"?> 
 <?xul-overlay href="chrome://global/content/editMenuOverlay.xul"?>
 <?xul-overlay href="chrome://global/content/charsetOverlay.xul"?>
 
@@ -71,9 +72,10 @@
   <stringbundle id="findBundle" src="chrome://global/locale/finddialog.properties"/>
   <stringbundle id="viewSourceBundle" src="chrome://global/locale/viewSource.properties"/>
 
-  <command id="cmd_print" oncommand="PrintUtils.print();"/>
-  <command id="cmd_pagesetup" oncommand="PrintUtils.showPageSetup();"/>
   <command id="cmd_savePage" disabled="true" oncommand="ViewSourceSavePage();"/>
+  <command id="cmd_print" oncommand="PrintUtils.print();"/>
+  <command id="cmd_printpreview" oncommand="PrintUtils.printPreview(onEnterPP, onExitPP);"/>
+  <command id="cmd_pagesetup" oncommand="PrintUtils.showPageSetup();"/>
   <command id="cmd_close" oncommand="window.close();"/>
   <commandset id="editMenuCommands"/>
   <command id="cmd_goToLine" oncommand="ViewSourceGoToLine();" disabled="true"/>
@@ -107,6 +109,8 @@
                     label="&savePageCmd.label;" accesskey="&savePageCmd.accesskey;"/>
           <menuitem command="cmd_pagesetup"
                     label="&pageSetupCmd.label;" accesskey="&pageSetupCmd.accesskey;"/>
+          <menuitem command="cmd_printpreview"
+                    label="&printPreviewCmd.label;" accesskey="&printPreviewCmd.accesskey;"/>
           <menuitem key="key_print" command="cmd_print"
                     label="&printCmd.label;" accesskey="&printCmd.accesskey;"/>
           <menuseparator/>
diff --git a/mozilla/toolkit/components/viewsource/jar.mn b/mozilla/toolkit/components/viewsource/jar.mn
index b1576ed9ffc..43cfc1bf21f 100644
--- a/mozilla/toolkit/components/viewsource/jar.mn
+++ b/mozilla/toolkit/components/viewsource/jar.mn
@@ -1,8 +1,9 @@
 toolkit.jar:
-* content/global/viewSource.xul             (content/viewSource.xul)
+* content/global/viewSource.css             (content/viewSource.css)
 * content/global/viewSource.js              (content/viewSource.js)
-* content/global/viewPartialSource.xul      (content/viewPartialSource.xul)
+* content/global/viewSource.xul             (content/viewSource.xul)
 * content/global/viewPartialSource.js       (content/viewPartialSource.js)
+* content/global/viewPartialSource.xul      (content/viewPartialSource.xul)
 
 en-US.jar:
   locale/en-US/global/viewSource.dtd        (locale/viewSource.dtd)
diff --git a/mozilla/toolkit/components/viewsource/locale/viewSource.dtd b/mozilla/toolkit/components/viewsource/locale/viewSource.dtd
index 81a7a76aed6..e9ada92bbb8 100644
--- a/mozilla/toolkit/components/viewsource/locale/viewSource.dtd
+++ b/mozilla/toolkit/components/viewsource/locale/viewSource.dtd
@@ -15,6 +15,8 @@
 <!ENTITY savePageCmd.commandkey "S">
 <!ENTITY pageSetupCmd.label "Page Setup...">
 <!ENTITY pageSetupCmd.accesskey "u">
+<!ENTITY printPreviewCmd.label "Print Preview">
+<!ENTITY printPreviewCmd.accesskey "v">
 <!ENTITY printCmd.label "Print...">
 <!ENTITY printCmd.accesskey "P">
 <!ENTITY printCmd.commandkey "P">