Vcard download on FB mobile

[A-Tawfik]

Because Facebook has its own browser for links from it's mobile app, vcards will not download on mobile devices when linked through Facebook.

possible solution: Have link open native default browser for vcard download link when on mobile platform.

[msimonborg]

Slack's in-app browser doesn't support the file downloads either.

We really need to force the native browser. A majority of our traffic is mobile, and the vast majority of our referrals are from FB, so this is high priority IMO

[jonathanwmaddison]

I looked into this briefly and haven't found a good solution:
"An easier but still not optimal solution would be to detect the Facebook browser in the user-agent string, and display a message to prompt users to visit the URL in the mobile browser."

From: http://stackoverflow.com/questions/21842775/open-link-in-mobile-browsersafari-instead-of-facebook-native-browser-html-bas

How does that sound as an interim solution? I could take a stab at it.