Since iOS is a "walled garden," you cannot simply click a .ipa file to install it. You generally need specific tools to "sign" and sideload the file onto your device:
If you meant something else — like downloading an older version, installing on a jailbroken device, or accessing Facebook via an unofficial client — let me know, and I can explain the risks and legal boundaries clearly. facebook .ipa
: If a recent update is buggy or removes a feature you love, users often seek older versions of the Facebook .ipa to revert back. Since iOS is a "walled garden," you cannot simply click a