title: Amazon Checkout in Facebook Page
body: <p>I have integrated Checkout by Amazon(CBA) in my application. It working fine in outside the Facebook. In Facebook, it blocking the Amazon login popup window.</p>
  
  <p><img src="https://i.stack.imgur.com/HT2ZD.png" alt="enter image description here"></p>
  
  <p>When i use to click 'Pay with Amazon' button, it should ask for Amazon login in pop-up window but there is no response. Is there any issue with  Facebook iframe? Please help me.
  Thanks!!</p>