TOR Browser Bundle interprets 'mailto' links as downloads
If a 'mailto' link (e.g. mailto:user@example.com) is clicked, instead of starting a new email in an email client, the TOR Browser Bundle gives the warning:
Tor Browser cannot display this file. You will need to open it with another application. Some types of files can cause applications to connect to the internet without using Tor. To be safe, you should only open downloaded files while offline, or use a Tor live CD such as Tails.
mailto: addresses are not files, and no data can be leaked from clicking on one. To be fixed, this warning should be removed for mailto: addresses and an attempt should be made to open the address in the default system mail client.
Trac:
Username: Orthogonal