It is a pretty simple thing to add an Amplify feed to a Facebook tab. You will have to install an app, we do prefer the static html plus app (, which is free and very simple to setup. 

After you've installed the app, paste the code that you get from clicking Publish->On a website. Save & Publish. You are now good to go. Keep in mind however that Facebook tabs are not supported on mobile screens (it's crazy, we know).  

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