Facebook: the app for Windows 10 is back with a beta
This is specifically a Progressive Web Application based on Edge's Chromium engine and which requires build 19003 (or later) of the operating system. Below is the description provided with a clarification on the fact that being a beta release it could be affected by bugs: the Zuckerberg group invites users to report them so that they can intervene where necessary with corrections.This is a beta version of the Facebook application for Windows 10. Try it first and you will be able to discover our latest features. We are constantly improving our beta versions, so please let us know if something is wrong by selecting "Report a Problem" from the drop-down menu at the top right.
Features include support for Dark Mode as visible in the screenshot below and the one needed to show notifications in the dedicated area of Windows 10.
Source: Microsoft Store