Here are the steps for Adding Facebook Tumbler link to your website.
- From the StoreFronts page, scroll down and click on the Social Tab.
The Social Network and Share Settings screen will appear. Enter your Facebook account Tumblr URL in the Facebook Account field. Click the check box to the right of "Share on Facebook Button" if you want to allow users to share items.
Feel free to configure other accounts while you are here.
Click the Save button when finished.