Setting org.icefaces.ace.fileEntry.requireJavascript to true causes the server side handling of ace:fileEntry file uploads to require that the browser have javascript enabled.
With this parameter set to false, ace:fileEntry may not allow other upload components to function in the application, but ace:fileEntry will work without javascript being enabled in the browser, as long as the form's enctype property is set for multipart:
<h:form enctype="multipart/form-data">.
<context-param>
<param-name>org.icefaces.ace.fileEntry.requireJavascript</param-name>
<param-value>false</param-value>
</context-param>