You will lose access to Groups features, modern Marketplace chat, and live video. But you will gain speed, privacy (less tracking via legacy code), and your attention span back.
Until Meta releases a "Retro Mode" (which they likely never will), your best bet is or a heavily-modified browser extension. facebook in old version
The search for the "old version of Facebook" isn't really about pixels or buttons. It is a digital protest. It is users saying, "We don't want an AI-powered shopping mall. We just want to see our nephew's soccer photos and log off." You will lose access to Groups features, modern
If you really miss the old days, try logging into Facebook on an old iPod Touch or a BlackBerry. The servers will force a legacy layout. For a few minutes, you’ll feel like it’s 2010 again—before the algorithm learned how to yell at you. The search for the "old version of Facebook"
The modern Facebook app is notoriously heavy. On a budget Android phone, the main app takes 500MB+ of storage and drains your battery in 4 hours. The old version (or Facebook Lite) uses barely 50MB. It runs smoothly on 2G networks and saves your phone’s processor from melting.