Add Open Graph metadata
It has been suggested to the help desk that we add the following to the website code:
<meta property="og:image" content="https://www.torproject.org/images/tor-logo.jpg" />
To my understanding, this would cause the Tor logo to appear when people spells “https://www.torproject.org/” in Facebook. Right now, it looks like it is the Internet Defense League one.
More information at http://ogp.me/