On tab select, the URL is updated.

IPython/frontend/html/notebook/static/js/projectdashboardmain.js

@@ -1,35 +1,39 b''
 //----------------------------------------------------------------------------
 //  Copyright (C) 2008-2011  The IPython Development Team
 //
 //  Distributed under the terms of the BSD License.  The full license is in
 //  the file COPYING, distributed as part of this software.
 //----------------------------------------------------------------------------
 
 //============================================================================
 // On document ready
 //============================================================================
 
 
 $(document).ready(function () {
 
     IPython.page = new IPython.Page();
 
     $('div#tabs').tabs();
+    $('div#tabs').on('tabsselect', function (event, ui) {
+        var new_url = $('body').data('baseProjectUrl') + '#' + ui.panel.id;
+        window.history.replaceState({}, '', new_url);
+    });
     $('div#main_app').addClass('border-box-sizing ui-widget');
     $('div#notebooks_toolbar').addClass('ui-widget ui-helper-clearfix');    
     $('#new_notebook').button().click(function (e) {
         window.open($('body').data('baseProjectUrl')+'new');
     });
 
     IPython.read_only = $('body').data('readOnly') === 'True';
     IPython.notebook_list = new IPython.NotebookList('div#notebook_list');
     IPython.cluster_list = new IPython.ClusterList('div#cluster_list');
     IPython.login_widget = new IPython.LoginWidget('span#login_widget');
 
     IPython.notebook_list.load_list();
     IPython.cluster_list.load_list();
 
     IPython.page.show();
 
 });