For a successful installation on Android 5.1 (API 22), the APK must meet specific architecture and DPI requirements: Android 5.1+ (Lollipop MR1). Architecture: Most commonly armeabi-v7a .
If you are using an older device running Android 5.1 (Lollipop) facebook para android 5.1 9 apk
Older hardware struggles with the full Facebook app. If you successfully install , apply these tweaks: For a successful installation on Android 5
Remember: performance and security should always come before convenience. Browse safely, keep your data backed up, and consider moving to a newer device or custom ROM for the best Facebook experience. keep your data backed up