RadClientExportManager for ASP.NET AJAX supports the following browsers:
Internet Explorer 9+
Firefox Current, previous and ESR
Opera 15.0+ (Blink) and 12.0+ (Presto)
Google Chrome Current and previous
In IE9, Safari, and any iOS system the RadClientExportManager requires its ProxyURL to be set, as explained in the IE9 and Safari Compatibility article.