[header] How to add a like box on tumblr [title] Sign up for a facebook account, if you haven't already. [step] If you have, make sure you're logged in tot he right account before you begin. [title] Open a new tab in your browser and go to the facebook developers site. 
[step] Search for " social plug ins " and click on the " like box " option. [title] Open a new tab and go back to your facebook profile on your personal page.