If you don't want to (or cannot) share the page to test with a third party there are client-only solutions like http://www.browseemall.com http://www.browseemal

If you don't want to (or cannot) share the page to test with a third party there are client-only solutions like http://www.browseemall.com http://www.browseemall.com which take up less space and are more convenient than full blown VMs.