When observing the `Network` tab of Chrome's Developer Tools on a profile page on Facebook, I noticed that almost no XHR requests have been captured. Clicking around the profile page, like clicking on a link to view the profile's photos shows that no AJAX requests have been made, but the site seems to remain on the same page like a single-page-application and behave very AJAX-like.

Does Facebook profile pages really use AJAX requests like jQuery's `$.get()`? If so, why dont they appear in Developer Tools. If not, how can I achieve the same effect?