Now you can use Facebook reactions anywhere! Simply install the addon for Firefox and click on its icon to download a Facebook reaction image.
Reactions-anywhere is on the Chrome Web Store here.
The .crx file can be found with the other releases.
The .xpi file can be found with the other releases.
It has been submitted to AMO for review and (if approved) will be available here.
You need webpack installed.
yarn install
webpack
Webpack will complain about undefined variables browser and chrome.
This is normal: those variables are defined in the browser API.