web/support_branding/views/qweb.xml

<?xml version="1.0" encoding="UTF-8"?>
<odoo>
    <data>
        <template
            id="support_branding_assets"
            name="support_branding assets"
            inherit_id="web.assets_backend">
            <xpath expr="." position="inside">
                <script type="text/javascript" src="/support_branding/static/src/js/support_branding.js"></script>
                <link rel="stylesheet" href="/support_branding/static/src/css/support_branding.css" />
            </xpath>
        </template>
        <template id="menu_secondary" inherit_id="web.menu_secondary">
            <xpath expr="//div[@class='o_sub_menu_footer']" position="inside">
                <span>, supported by
                    <a target="_new" t-att-href="request.env['ir.config_parameter'].get_param('support_branding.company_url')"
                        t-att-style="'color: ' + request.env['ir.config_parameter'].get_param('support_branding.company_color')">
                        <t t-esc="request.env['ir.config_parameter'].get_param('support_branding.company_name')" />
                    </a>
                </span>
                <div t-if="request.env['ir.config_parameter'].get_param('support_branding.release')">
                    Version <t t-esc="request.env['ir.config_parameter'].get_param('support_branding.release')" />
                </div>
            </xpath>
        </template>
    </data>
</odoo>