: Go to Settings > Security (or Privacy) and toggle on the option to Install unknown apps for your browser.
The official Facebook app receives security patches every two weeks. Facebook Plus 1.0 is frozen in time. If a critical vulnerability like "Stagefright" or a new SSL exploit is discovered, your version will remain vulnerable for years. Hackers actively scan for devices running old, modded apps. facebook plus 1.0 APK for Android