Chrome/Firefox: People either love or hate Facebook's new stickers. Unsticker.me is an open source extension for Firefox and Chrome that removes the stickers on comments if you don't want to see them.
Stickers (which are basically very large emojis) have been a feature in Facebook's Messenger for a while, but Facebook recently enabled them in comments as well. If you find the stickers annoying, Unsticker.me is an easy fix.
All you have to do is install the extension and from then on you won't see stickers when you're logged into Facebook -- even if you post them yourself. In place of the sticker, you'll see the word "sticker" in brackets. If you ever want to know what a particular sticker is, you'll have to disable the extension and refresh the page to see it.
Unsticker.me [Chrome Web Store]