Since "Android 5.1" refers to the operating system version rather than the Facebook app version, you are likely looking for a version of Facebook compatible with older devices (Lollipop).
Step 2: Download the APK
Tap the download button. The file will be saved to your Downloads folder. facebook para android 5.1 9 apk
Security and Privacy Risks While the nostalgia of a lighter app is appealing, using Facebook v5.1.9 in the present day carries significant security implications: Since "Android 5
To run Facebook on Android 5.1, you generally have two reliable options: using Facebook Lite or finding a compatible legacy APK from a trusted archive. Option 1: Facebook Lite (Recommended) facebook para android 5.1 9 apk