There are several reasons why you might want to download the Facebook APK on your Android 5.1 device:
If APK installations fail due to security certificate errors on your device, using a secure mobile browser (like Opera Mini or an updated Chrome version) to access ://facebook.com provides a reliable, app-like experience without draining system resources. How to Safely Download and Install the APK apk facebook android 5.1
If the full app still runs slow, I highly recommend looking at Facebook Lite instead. It's designed to work on low-end, older devices and is much faster on Android 5.1. Share public link There are several reasons why you might want