diff --git a/xpcom/glue/nsVoidArray.cpp b/xpcom/glue/nsVoidArray.cpp
index 7586af4afb4..fb93258f5ad 100644
--- a/xpcom/glue/nsVoidArray.cpp
+++ b/xpcom/glue/nsVoidArray.cpp
@@ -934,6 +934,27 @@ nsCStringArray::nsCStringArray(void)
 {
 }
 
+// Parses a given string using the delimiter passed in and appends items
+// parsed to the array.
+void
+nsCStringArray::ParseString(const char* string, const char* delimiter)
+{
+  if (string && *string && delimiter && *delimiter) {
+    char *newStr;
+    char *rest = nsCRT::strdup(string);
+    char *token = nsCRT::strtok(rest, delimiter, &newStr);
+
+    while (token) {
+      if (*token) {
+        /* calling AppendElement(void*) to avoid extra nsCString copy */
+        AppendElement(new nsCString(token));
+      }
+      token = nsCRT::strtok(newStr, delimiter, &newStr);
+    }
+    PR_FREEIF(rest);
+  }
+}
+
 nsCStringArray::nsCStringArray(PRInt32 aCount)
   : nsVoidArray(aCount)
 {
diff --git a/xpcom/glue/nsVoidArray.h b/xpcom/glue/nsVoidArray.h
index 95d17b11e9e..c9691473395 100644
--- a/xpcom/glue/nsVoidArray.h
+++ b/xpcom/glue/nsVoidArray.h
@@ -270,6 +270,13 @@ public:
 
   nsCStringArray& operator=(const nsCStringArray& other);
 
+  // Parses a given string using the delimiter passed in. If the array
+  // already has some elements, items parsed from string will be appended 
+  // to array. For example, array.ParseString("a,b,c", ","); will add strings
+  // "a", "b" and "c" to the array. Parsing process has the same tokenizing 
+  // behavior as strtok().  
+  void ParseString(const char* string, const char* delimiter);
+
 #ifdef DEBUG
   void  SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
 #endif