Hello, After the update to firefox 57, the facebook sdk that seems to work well with the new firefox. I'm seling a plugin on envato that allow people to like a page in order to have a discount and my plugin does not work with the new firefox. You can give a try here: http://demo-social.xcid.fr/product/land-tee-jack-jones/ You just need to click on the facebook like button to see that nothing append, you can also try with chrome to see that it's working. Don't hesitate if you need more information Regards