Now a days Facebook updating its feature one by one like Video calling, Sidebar chat and more. Now Facebook’s new Update is Link preview in Comment section. If you type URL link in the Comments, you can see the Preview of the link, same while you post a link in your wall. See Screen shot below
You also try by typing the URL link in the comment and Press ENTER. You can see the Preview of the URL which u mentioned in the comment. Even you can remove the Preview by Clicking ‘REMOVE PREVIEW’ option which is available below the comment itself. Its not a big update but it helps lots of people to know where the link is linked too.
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