Facebook users are seen seeing the clickable icon of Facebook 's subsidiary WhatsApp when using the Facebook app on Android . The button allows the user to use Facebook without leaving the Facebook app . It was discovered by a user who had changed their Facebook language setting to Danish , the company has been able to test limited rollouts in Denmark in the past . It remains to be discussed whether the app will be available for all users .
Facebook users are reporting seeing the clickable icon of Facebook's subsidiary WhatsApp when using the Facebook app on Android. The button allows the user to use WhatsApp without leaving the Facebook app. It was discovered by a user who had changed their Facebook language setting to Danish, the company has been known to test limited rollouts in Denmark in the past. It remains to be seen whether the button will be available for all users.