diff --git a/xpcom/io/nsFileSpec.h b/xpcom/io/nsFileSpec.h
index d231648877e6..4fb4508aca89 100644
--- a/xpcom/io/nsFileSpec.h
+++ b/xpcom/io/nsFileSpec.h
@@ -464,6 +464,7 @@ class NS_COM nsFileSpec
         void                    CreateDir(int mode = 0700) { CreateDirectory(mode); }
                                    // workaround for yet another VC++ bug with long identifiers.
         void                    Delete(PRBool inRecursive) const;
+        void                    RecursiveCopy(nsFileSpec newDir) const;
         
         nsresult                Rename(const char* inNewName); // not const: gets updated
         nsresult                Rename(const nsString& inNewName)
diff --git a/xpcom/io/nsFileSpecMac.cpp b/xpcom/io/nsFileSpecMac.cpp
index 461c1d50a864..e0bba25ca083 100644
--- a/xpcom/io/nsFileSpecMac.cpp
+++ b/xpcom/io/nsFileSpecMac.cpp
@@ -905,6 +905,51 @@ void nsFileSpec::Delete(PRBool inRecursive) const
    
 } // nsFileSpec::Delete
 
+//----------------------------------------------------------------------------------------
+void nsFileSpec::RecursiveCopy(nsFileSpec newDir) const
+//----------------------------------------------------------------------------------------
+{
+    if (IsDirectory())
+    {
+		if (!(newDir.Exists()))
+		{
+			newDir.CreateDirectory();
+		}
+
+		for (nsDirectoryIterator i(*this); i.Exists(); i++)
+		{
+			nsFileSpec& child = (nsFileSpec&)i;
+
+			if (child.IsDirectory())
+			{
+				nsFileSpec tmpDirSpec(newDir);
+
+				char *leafname = child.GetLeafName();
+				tmpDirSpec += leafname;
+				nsCRT::free(leafname);
+
+				child.RecursiveCopy(tmpDirSpec);
+			}
+			else
+			{
+   				child.RecursiveCopy(newDir);
+			}
+		}
+    }
+    else if (!mPath.IsEmpty())
+    {
+		nsFileSpec& filePath = (nsFileSpec&) *this;
+
+		if (!(newDir.Exists()))
+		{
+			newDir.CreateDirectory();
+		}
+
+        filePath.Copy(newDir);
+    }
+} // nsFileSpec::RecursiveCopy
+
+
 //----------------------------------------------------------------------------------------
 nsresult nsFileSpec::Rename(const char* inNewName)
 //----------------------------------------------------------------------------------------
diff --git a/xpcom/io/nsFileSpecUnix.cpp b/xpcom/io/nsFileSpecUnix.cpp
index dd6a4e85c661..bb9c73321aff 100644
--- a/xpcom/io/nsFileSpecUnix.cpp
+++ b/xpcom/io/nsFileSpecUnix.cpp
@@ -232,6 +232,51 @@ void nsFileSpec::Delete(PRBool inRecursive) const
         remove(mPath);
 } // nsFileSpec::Delete
 
+//----------------------------------------------------------------------------------------
+void nsFileSpec::RecursiveCopy(nsFileSpec newDir) const
+//----------------------------------------------------------------------------------------
+{
+    if (IsDirectory())
+    {
+		if (!(newDir.Exists()))
+		{
+			newDir.CreateDirectory();
+		}
+
+		for (nsDirectoryIterator i(*this); i.Exists(); i++)
+		{
+			nsFileSpec& child = (nsFileSpec&)i;
+
+			if (child.IsDirectory())
+			{
+				nsFileSpec tmpDirSpec(newDir);
+
+				char *leafname = child.GetLeafName();
+				tmpDirSpec += leafname;
+				nsCRT::free(leafname);
+
+				child.RecursiveCopy(tmpDirSpec);
+			}
+			else
+			{
+   				child.RecursiveCopy(newDir);
+			}
+		}
+    }
+    else if (!mPath.IsEmpty())
+    {
+		nsFileSpec& filePath = (nsFileSpec&) *this;
+
+		if (!(newDir.Exists()))
+		{
+			newDir.CreateDirectory();
+		}
+
+        filePath.Copy(newDir);
+    }
+} // nsFileSpec::RecursiveCopy
+
+
 //----------------------------------------------------------------------------------------
 nsresult nsFileSpec::Rename(const char* inNewName)
 //----------------------------------------------------------------------------------------
diff --git a/xpcom/io/nsFileSpecWin.cpp b/xpcom/io/nsFileSpecWin.cpp
index 7c8a70568ffa..a3d131009ab2 100644
--- a/xpcom/io/nsFileSpecWin.cpp
+++ b/xpcom/io/nsFileSpecWin.cpp
@@ -282,6 +282,50 @@ void nsFileSpec::Delete(PRBool inRecursive) const
 } // nsFileSpec::Delete
 
 
+//----------------------------------------------------------------------------------------
+void nsFileSpec::RecursiveCopy(nsFileSpec newDir) const
+//----------------------------------------------------------------------------------------
+{
+    if (IsDirectory())
+    {
+		if (!(newDir.Exists()))
+		{
+			newDir.CreateDirectory();
+		}
+
+		for (nsDirectoryIterator i(*this); i.Exists(); i++)
+		{
+			nsFileSpec& child = (nsFileSpec&)i;
+
+			if (child.IsDirectory())
+			{
+				nsFileSpec tmpDirSpec(newDir);
+
+				char *leafname = child.GetLeafName();
+				tmpDirSpec += leafname;
+				nsCRT::free(leafname);
+
+				child.RecursiveCopy(tmpDirSpec);
+			}
+			else
+			{
+   				child.RecursiveCopy(newDir);
+			}
+		}
+    }
+    else if (!mPath.IsEmpty())
+    {
+		nsFileSpec& filePath = (nsFileSpec&) *this;
+
+		if (!(newDir.Exists()))
+		{
+			newDir.CreateDirectory();
+		}
+
+        filePath.Copy(newDir);
+    }
+} // nsFileSpec::RecursiveCopy
+
 //----------------------------------------------------------------------------------------
 nsresult nsFileSpec::Rename(const char* inNewName)
 //----------------------------------------------------------------------------------------