The wisest path is to first try or use the mobile browser version (m.facebook.com) in your browser, which is surprisingly robust and data-friendly. If you choose to install an old APK, treat it like a borrowed tool: use it only for as long as necessary, stay informed about its risks, and be ready to update or uninstall it if you notice any strange behavior. In the tug-of-war between nostalgia and security, security should always win.