Facebook has recently made a change in their commenting system. Now, they are giving a permanent link to each individual comment on a status update, photo, video –whatever posted on Facebook.
If you click on the timestamp of a comment –you’ll be taken to a new page showing the post and all the comments associated with the post. The comment in question will be highlighted with light yellow colour. Highlighting, however, will fade away within a few seconds.
This feature allows you to send and share the link to a particular comment. This could also be used in citations. It would have been better if highlighting colour would remain and not fade away. A solid highlighting colour would have made it easier to look for the comment.