Ie Xbox app

Like many mobile devices, Internet Explorer on Xbox does not support browser plug-ins. If a webpage uses a plug-in such as Flash, Java or Silverlight, the webpage may appear blank or notify you that a plug-in is required. If you experience this issue, follow
these steps to configure Internet Explorer to request the mobile version of pages you visit.

[Note This setting can also help if the webpage you are visiting doesn't look right on your TV.]

Press Y to display the Web Hub.

Select the Settings icon on the address bar.

Select the check box for Use web pages formatted for mobile devices.

Select OK, and then reload the webpage.

Xbox Support is Fixing the issue they are at work for the Xbox 360 IE App

There is no facebook app on the Xbox One at the moment. You can use the IE app to access it though.

So when is it gonna be Fixed for the Xbox 360 version of the IE App Joust

As the Internet Explorer app was released they "retired" the 2 apps as you can just use IE to view them on XBOX instead