: Open your device's File Manager, locate the downloaded .apk file, and tap it to begin the installation.
Facebook for Android 4.4.2: The Final Stable Release for KitKat Users Excerpt: “If you are still running Android 4.4.2 KitKat on your legacy device, you have likely noticed that the Play Store no longer offers new updates. This is a deep dive into the last compatible version of Facebook (Variant 430.0.0.28.110) for KitKat, focusing on performance tweaks, security patches, and how to sideload the APK safely to keep Messenger working.” Facebook For Android 4.4.2