Sparkle supports the standard Facebook plug-ins.
Please refer to Facebook documentation for further information.
If you have an ad or content blocker installed in Safari, Facebook gets removed from the page (as it tracks users via cookies), so the Facebook button won’t be visible in preview or in the published site. Disabling the blocker or whitelisting preview of your site will show the Facebook button properly.
Updated for Sparkle 2.6
Please report any shortcoming in this documentation and we’ll fix it as soon as possible!