Comment Suggestion од MQuy

Comment Suggestion makes it easy to send emojis, GIFs in any text field. To get started, type ":smi" or "/giphy" and using ENTER to get suggestion and ARROW DOWN UP to navigate. Command intelligently formats whatever you'd like to send for any text field — so it supports sites like Github, Gmail, Inbox, and Reddit out of the box.

DISCLAIMER:
+ Currently, you have to type space after emoji to make it work on facebook, facebook will remove emoji(not kawaii) from new post( works fine for comment)
+ Images are captured from MAC, emoji might display differently depend on Window, Linux, ...
+ Don't work on input with autocomplete off