Switch from chrome://extensions to chrome://settings/extensionSettings.

chrome/browser/extensions/extension_context_menu_model.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/extension_context_menu_model.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_tabs_module.h"
 #include "chrome/browser/prefs/pref_service.h"
@@ skipping 118 matching lines @@
       extension_service->DisableExtension(extension_id_);
       break;
     }
     case UNINSTALL: {
       AddRef();  // Balanced in Accepted() and Canceled()
       extension_uninstall_dialog_.reset(new ExtensionUninstallDialog(profile_));
       extension_uninstall_dialog_->ConfirmUninstall(this, extension);
       break;
     }
     case MANAGE: {
-      browser_->OpenURL(GURL(chrome::kChromeUIExtensionsURL), GURL(),
-                        SINGLETON_TAB, PageTransition::LINK);
+      browser_->ShowOptionsTab(chrome::kExtensionsSubPage);
       break;
     }
     case INSPECT_POPUP: {
       delegate_->InspectPopup(extension_action_);
       break;
     }
     default:
      NOTREACHED() << "Unknown option";
      break;
   }
 }
 
 void ExtensionContextMenuModel::ExtensionDialogAccepted() {
   if (GetExtension())
     profile_->GetExtensionService()->UninstallExtension(extension_id_, false,
                                                         NULL);
 
   Release();
 }
 
 void ExtensionContextMenuModel::ExtensionDialogCanceled() {
   Release();
 }
 
 const Extension* ExtensionContextMenuModel::GetExtension() const {
   ExtensionService* extension_service = profile_->GetExtensionService();
   return extension_service->GetExtensionById(extension_id_, false);
 }