Disabling Guest Mode for Facebook Messenger Chat Bubble

Guest mode is enabled by default for every Facebook page. To disable this feature please follow these steps:

Step 1: Go to the Facebook page related to this chat bubble and on the left navigation menu (when viewing from desktop) click on "Settings".

Step 2: Click on the left navigation menu for "Messaging" and then scroll down the main page until you see "Add Messenger to your website" and click "Get Started"

Step 3: In the opened window you’ll need to click next until you see the “Let People Chat as a Guest” setting and disable the corresponding toggle.