Being the curious lad, I decided to switch to the new UI and have not looked back.

Although the first impression was unsettling over time, I got used to the new streamlined user-interface.

The content was spaced out, and the entire wide-screen monitors were put to use.

New Facebook

Secondly, the new UI is designed to keep the waste of screen resolution to the minimum.

Facebook UI notification

New Facebook settings

Dark mode and Normal Mode in Facebook

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source: www.techworm.net