Нашёл 14 млн ответов for 'download facbook'.
https://www.facebook.com/android_upgrade
https://www.facebook.com/lite/
https://m.facebook.com/lite/
https://facebook.en.uptodown.com/android/download
https://facebook.en.uptodown.com/
https://play.google.com/store/apps/details?id=com.facebook.katana&hl=en&gl=US
https://fbdown.net/
https://m.apkpure.com/facebook/com.facebook.katana
https://apkpure.com/facebook/com.facebook.katana
https://facebook.en.softonic.com/