app-odoo/app_odoo_customize/static/src/js/app_window_title.js

odoo.define('app_odoo_customize.app_system_name', function (require) {
"use strict";

var WebClient = require('web.WebClient');
WebClient.include({
    init: function() {
        this._super.apply(this, arguments);
        this.set('title_part', {"zopenerp": document.title});
    }
});

});