Do not use the official XAP. Use the "Web App" feature of Windows Phone. Pin m.facebook.com to your start screen. It acts 90% like a native app and is technically more "new" than any XAP you will find. Have you found a newer Facebook XAP than version 8.3.7.0? Upload it to the community archives. Windows Phone isn't dead; it's just waiting for revival.
If you actually need to stay connected, . The "newest" XAP is still 8 years old. The modern Facebook website refuses to render correctly in the integrated IE/EdgeHTML browser. facebook windows phone xap new
If you are desperately searching for a —hoping to find a fresh, working installation file—you have arrived at the right place. This guide covers the history of the app, where to find the last "new" builds, and how to side load them. The XAP Evolution: From Microsoft to Facebook First, a quick history lesson. The file extension .xap (not to be confused with Silverlight XAP) is the application package for Windows Phone 7, 8, and 8.1. (Windows 10 Mobile later shifted to .appx ). Do not use the official XAP
By: Windows Phone Legacy Archive