|
Action that a web browser takes when opening a file is determined by the MIME-type of the file. That MIME-type is returned by your web server software.
Most likely, your web server is set up to return the MIME-type text/plain for any unknown files. text/plain is just opened by browsers.
You should edit your web server's config file: associate the .vcf files with the application/octet-stream MIME-type. When the server returns that MIME type, browser doesn't even try to open it, and asks where to save it.
|