If you are wondering about how to then you need to start by launching Google Chrome and tap on menu icon in upper right corner of browser window. Choose settings from the drop-down menu. Now, scroll down to find show advanced settings. Look for content settings under privacy and security section and tap to it. Scroll down to notifications section and choose it. Here, choose ask before sending. This toggle asks before sending. The toggle is on by default and it will ask you if you want to receive notifications from website. With your notifications section, ensure to ask before sending toggle. Search for Facebook.com in the allow section. Tap on 3-dot icon and select to block.