F12 打开 检查元素 ,选择 console 并在 terminal 中填入如下代码然后回车运行

var eles = document.getElementsByTagName('*');
for (var i = 0; i < eles.length; i++) {
    eles[i].style.userSelect = 'text';
}

Reference: https://www.jianshu.com/p/3aa7b8cedfeb