Why like on Facebook with a thumbs up or a smiley face? face, when you can use your own icons?
Facebook Reactions has been out for just over a week, but there's already a fun new extension for Firefox and Chrome, which lets you replace emoji templates with Pokémon or other expressions from different faces.
You can also upload your own emoji (icons) package that you want to use.
The extension is called Reaction Packs and as mentioned above it works in Firefox and its Chrome Google.
Just download and install the plugin. Then from the extension website, you can choose which new ones reactions you want to use it on Facebook, or upload your own package.
If you go back to Facebook, simply refresh the page and smileys will be replaced with the images you chose.
Upload your own package - Publish a new Pack