If you must have the full app, you would need to download a version released around 2014–2015 Risk Warning
On older Android versions like Jelly Bean (4.2.2), you must manually enable APK installations: Facebook Apk For Android 4.2.2
The reason for this is simple but important. Meta, Facebook's parent company, regularly updates its applications with new features, security patches, and performance improvements. Many of these modern features rely on tools, libraries, and security protocols that are not present in older operating systems like Android 4.2.2. Continuing to support such an outdated OS would be technically complex, hindering development for the vast majority of users on newer systems. If you must have the full app, you
