--- a/dom/interfaces/css/nsIDOMCSS2Properties.idl
+++ b/dom/interfaces/css/nsIDOMCSS2Properties.idl
@@ -46,17 +46,17 @@
  * The nsIDOMCSS2Properties interface is a datatype for additional
  * reflection of data already provided in nsIDOMCSSStyleDeclaration in
  * the Document Object Model.
  *
  * For more information on this interface please see
  * http://www.w3.org/TR/DOM-Level-2-Style
  */
 
-[builtinclass, scriptable, uuid(79b66107-f9d2-42ac-bc68-b558d79037ec)]
+[builtinclass, scriptable, uuid(10f43750-b379-11e0-aff2-0800200c9a66)]
 interface nsIDOMCSS2Properties : nsISupports
 {
            attribute DOMString        background;
                                         // raises(DOMException) on setting
 
            attribute DOMString        backgroundAttachment;
                                         // raises(DOMException) on setting
 
@@ -676,16 +676,25 @@ interface nsIDOMCSS2Properties : nsISupp
                                         // raises(DOMException) on setting
 
            attribute DOMString        MozTransform;
                                         // raises(DOMException) on setting
 
            attribute DOMString        MozTransformOrigin;
                                         // raises(DOMException) on setting 
 
+           attribute DOMString        MozPerspective;
+                                        // raises(DOMException) on setting
+
+           attribute DOMString        MozPerspectiveOrigin;
+                                        // raises(DOMException) on setting
+
+           attribute DOMString        MozBackfaceVisibility;
+                                        // raises(DOMException) on setting 
+
            attribute DOMString        MozWindowShadow;
                                         // raises(DOMException) on setting
 
            attribute DOMString        backgroundSize;
                                         // raises(DOMException) on setting
 
            attribute DOMString        MozTextBlink;
                                         // raises(DOMException) on setting

--- a/layout/style/nsCSSProps.cpp
+++ b/layout/style/nsCSSProps.cpp
@@ -346,21 +346,16 @@ nsCSSProps::LookupProperty(const nsACStr
                             *alias_end = gAliases + NS_ARRAY_LENGTH(gAliases);
          alias < alias_end; ++alias) {
       if (aProperty.LowerCaseEqualsASCII(alias->name)) {
         res = alias->id;
         break;
       }
     }
   }
-  
-  if (res == eCSSProperty_perspective || res == eCSSProperty_perspective_origin || res == eCSSProperty_backface_visibility) {
-    return eCSSProperty_UNKNOWN;
-  }
-
   return res;
 }
 
 nsCSSProperty
 nsCSSProps::LookupProperty(const nsAString& aProperty)
 {
   // This is faster than converting and calling
   // LookupProperty(nsACString&).  The table will do its own
@@ -372,21 +367,16 @@ nsCSSProps::LookupProperty(const nsAStri
                             *alias_end = gAliases + NS_ARRAY_LENGTH(gAliases);
          alias < alias_end; ++alias) {
       if (aProperty.LowerCaseEqualsASCII(alias->name)) {
         res = alias->id;
         break;
       }
     }
   }
-  
-  if (res == eCSSProperty_perspective || res == eCSSProperty_perspective_origin || res == eCSSProperty_backface_visibility) {
-    return eCSSProperty_UNKNOWN;
-  }
-
   return res;
 }
 
 nsCSSFontDesc
 nsCSSProps::LookupFontDesc(const nsACString& aFontDesc)
 {
   NS_ABORT_IF_FALSE(gFontDescTable, "no lookup table, needs addref");
   return nsCSSFontDesc(gFontDescTable->Lookup(aFontDesc));

--- a/layout/style/nsDOMCSSDeclaration.h
+++ b/layout/style/nsDOMCSSDeclaration.h
@@ -62,23 +62,16 @@ class nsDOMCSSDeclaration : public nsICS
 {
 public:
   // Only implement QueryInterface; subclasses have the responsibility
   // of implementing AddRef/Release.
   NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
 
   NS_DECL_NSICSSDECLARATION
 
-  NS_IMETHOD GetMozPerspective(nsAString_internal&);
-  NS_IMETHOD SetMozPerspective(const nsAString_internal&);
-  NS_IMETHOD GetMozPerspectiveOrigin(nsAString_internal&);
-  NS_IMETHOD SetMozPerspectiveOrigin(const nsAString_internal&);
-  NS_IMETHOD GetMozBackfaceVisibility(nsAString_internal&);
-  NS_IMETHOD SetMozBackfaceVisibility(const nsAString_internal&);
-
   // Require subclasses to implement |GetParentRule|.
   //NS_DECL_NSIDOMCSSSTYLEDECLARATION
   NS_IMETHOD GetCssText(nsAString & aCssText);
   NS_IMETHOD SetCssText(const nsAString & aCssText);
   NS_IMETHOD GetPropertyValue(const nsAString & propertyName,
                               nsAString & _retval);
   NS_IMETHOD GetPropertyCSSValue(const nsAString & propertyName,
                                  nsIDOMCSSValue **_retval);