https://thenextweb.com/facebook/2019/10/21/facebook-begins-testing-dark-mode-and-a-twitter-like-interface-for-desktop/

In May, Facebook said it was going to redesign the website and bring dark mode to its website and mobile apps. While it began testing dark mode for its Android app in August, it has now started rolling out a beta version of its website with that option to some users too.

Multiple people are being invited to test the new interface. The screenshots shared by testers are akin to design Facebook showed off at its developer conference F8 in May. The new version of the website kinda looks like Twitter: