This window refused to load until I allowed it to load Facebook. Somewhere, somehow, the content in this page will not display if the browser cannot connect to

This window refused to load until I allowed it to load Facebook. Somewhere, somehow, the content in this page will not display if the browser cannot connect to Facebook servers (I'm using Harmonic HN client on Android; it has built-in adblock for the webviews, but I use Tracker Control to block even more trackers; in this case whitelisting connect.facebook.net allowed the page to load)