diff --git a/addons/web/static/src/js/chrome.js b/addons/web/static/src/js/chrome.js
index 3aa3e6042ee..8804de96d34 100644
--- a/addons/web/static/src/js/chrome.js
+++ b/addons/web/static/src/js/chrome.js
@@ -1107,12 +1107,13 @@ openerp.web.WebClient = openerp.web.OldWidget.extend(/** @lends openerp.web.WebC
         self.menu.start();
     },
     show_common: function() {
-        var self = this;
-        self.crashmanager =  new openerp.web.CrashManager();
-        self.notification = new openerp.web.Notification(self);
-        self.notification.appendTo(self.$element);
-        self.loading = new openerp.web.Loading(self);
-        self.loading.appendTo(self.$element);
+        if (this.initialized_common) { return; }
+        this.initialized_common = true;
+        this.crashmanager =  new openerp.web.CrashManager();
+        this.notification = new openerp.web.Notification(this);
+        this.notification.appendTo(this.$element);
+        this.loading = new openerp.web.Loading(this);
+        this.loading.appendTo(this.$element);
     },
     destroy_content: function() {
         _.each(_.clone(this.widget_children), function(el) {