Hi, the facebook container is an add-on. To uninstall it follow these instructions:

1. Click the menu button and choose Add-ons.
2. Once the Add-on Manager has opened in a new tab, click the Extensions button on the left side of the window.
3. You should now see a list of your installed extensions on the right side together with buttons on the right side of each extension.
4. To remove the Facebook Container extension, simply click the Remove button next to it. You should see a message that informs you about the successful removal of the add-on.

You can find further information about uninstalling extensions here:

• Disable or remove Add-ons

Thank you for your help.... It's still the same one showing after I did what you showed. Actually I did this before I asked for help. I don't like the lay out of this Facebook or I would keep it. Thanks again