I use Symfony2 Framework and use the following code to export an xml file:
$response->setStatusCode(200);
$response->headers->set('Content-Type', 'application/xml');
$response->headers->set('Content-Description', 'Submissions Export');
$response->headers->set('Content-Disposition', 'attachment; filename="' . $filename .'"');
$response->headers->set('Content-Transfer-Encoding', 'binary');
$response->headers->set('Pragma', 'no-cache');
$response->headers->set('Expires', '0');
I does not matter whether I take "Content-Transfer-Encoding" or "Pragma" or all of them except "Content-Type" and "Content-Disposition" away. The result in Chrome is always: "filename-, attachment" (without the "). In Firefox this works fine.
So for instance, if I have a file called home.xml Firefox will download home.xml, whereas Chrome will give me home.xml-, attachment.