What is XHR in network in Chrome?

XHR is referred to “XmlHttpRequest” and it allows to make HTTP request in Javascript .

Chrome :

Capturing the network trace file on Google Chrome From the Chrome menu bar, select View > Developer > Developer Tools . From the panel that opens, select the Network tab. Look for a round record button in the upper-left corner of the tab, and make sure it is red. If it is grey, click it once to start recording.