OnHistoryStateUpdated仅在访问Facebook时创建chrome扩展名

Question

多次使用on-updated事件后，代码已更改为该代码.OnHistoryStateUpdated到底是什么条件？

background.js

chrome.webNavigation.onHistoryStateUpdated.addListener(function (details) {
            var domain = details.url;
            var google = 'https://www.google.co.kr/';

                var xhr = new XMLHttpRequest();
                xhr.onload = function () {
                    if (xhr.status === 200 || xhr.status === 201) {
                        console.log(xhr.responseText);
                    } else {
                        console.error(xhr.responseText);
                    }
                };
                xhr.open('POST', 'http://soylatte.kr:3000/image/check');
                xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                xhr.send('url=' + domain);


        })