Steps To Follow:
Step 1:- Go to any profile, official Page, or event that you want to use as an emoticons.
Step 2:- Look at the URL. Find the username or profile ID at the end of the URL such as ‘Allendev’
Step 3:- Place that name in double brackets like this [[AllenDEV]]
Step 4:- Enter that into a Facebook Chat.
Step 5:- When you send it, the profile picture of that person will appear as Emotion.