Edit file File name : Async.xml Content :<modification> <name>Asynchronous Javascript by A2 Hosting</name> <version>1.0</version> <link>http://a2hosting.com</link> <author>Benjamin Cool</author> <code>a2hosting_async_ocmod</code> <file path="catalog/view/theme/default/template/common/*.tpl"> <operation> <search ><![CDATA[<script]]></search> <add position="replace"><![CDATA[<script async]]></add> </operation> </file> </modification> Save