diff --git a/js/ndnProtocol/content/ndnToolbar.js b/js/ndnProtocol/content/ndnToolbar.js
new file mode 100644
index 0000000..3716b98
--- /dev/null
+++ b/js/ndnProtocol/content/ndnToolbar.js
@@ -0,0 +1,42 @@
+Components.utils.import("chrome://modules/content/ndn-js.jsm");
+
+function ndnToolbarGetLatest(event){
+  if (window._content.document.location.protocol != "ndn:") {
+    alert("The address must start with ndn");
+    return;
+  }
+
+  // Parse the same as in ndnProtocolService newChannel.
+  var spec = window._content.document.location.href.trim();
+  var preHash = spec.split('#', 1)[0];
+  var hash = spec.substr(preHash.length).trim();
+  var preSearch = preHash.split('?', 1)[0];
+  var search = preHash.substr(preSearch.length).trim();
+  // Set nameString to the preSearch without the protocol.
+  var nameString = preSearch.trim();
+  if (nameString.indexOf(':') >= 0)
+    nameString = nameString.substr(nameString.indexOf(':') + 1).trim();
+
+  var name = new Name(nameString);
+  var indexOfVersion = getIndexOfVersion(name);
+  if (indexOfVersion < 0) {
+    alert("The ndn address does not have a version");
+    return;
+  }
+
+  var nameWithoutVersion = new Name(name.components.slice(0, indexOfVersion));
+  var searchWithChildSelector = (search == "" ? "?" : search + "&") + "ndn.ChildSelector=1";
+    
+  var uri = "ndn:" + nameWithoutVersion.to_uri() + searchWithChildSelector + hash;
+  window._content.document.location = uri;
+} 
+
+// Return the index of the last component that starts with 0xfd, or -1 if not found.
+function getIndexOfVersion(name) {
+  for (var i = name.components.length - 1; i >= 0; --i) {
+    if (name.components[i].length >= 1 && name.components[i][0] == 0xfd)
+      return i;
+  }
+
+  return -1;
+}