Look for a version that is no more than 12–18 months old. Anything older than that is almost certainly a security risk. Cross-reference the version number with official Facebook release notes.
Downloading an older version of Facebook is a common workaround when the latest update causes lag, crashes, or compatibility issues on older devices. While the official App Store and Google Play Store only offer the most recent versions, you can find historical files on reputable third-party archives. Where to Download Old Versions fb old version download
Downloading an old version of Facebook can be a useful short-term fix for performance issues or unwanted feature changes. It can breathe new life into an aging smartphone or restore a beloved interface. However, it is undeniably a security compromise. Look for a version that is no more than 12–18 months old