Reaction Packs for Chrome and Firefox let users replace the social network's reactive emoji with their own custom symbols.
With the extension installed, users can create their own emoji or replace the Reaction smileys with packs created by others.
There are already some absolute crackers to choose from, including Pokemon and Donald Trump. Nothing says 'I disapprove' quite like the outrageous presidential candidate's snarling face.
You can download the browser extension and existing add-ons via the Reactions Packs website. And if you feel like getting creative, there's a tool on there for making your own.