The add-on is available here: https://addons.mozilla.org/en-US/firefox/addon/facebook-container/ https://addons.mozilla.org/en-US/firefox/addon/facebook-cont..

The add-on is available here: https://addons.mozilla.org/en-US/firefox/addon/facebook-container/ https://addons.mozilla.org/en-US/firefox/addon/facebook-cont... The source code is available: https://github.com/mozilla/contain-facebook https://github.com/mozilla/contain-facebook