<a href="http://www.xmarks.com/about/features">xmarks是什么？</a>
Install Xmarks on each computer you use, and it seamlessly integrates with your web browser and keeps your bookmarks safely backed up and in sync.
Xmarks will sync across browsers too. Today we support Firefox, Chrome, Internet Explorer, and Safari (Mac OS).
也可以在浏览器中搜索 xmarks 进行添加
登录成功后，就可以选择同步类型了。这步很关键。
其中火狐浏览器支持三种类型: Bi-directional sync 双向同步 √ upload from this browser only 仅仅从本浏览器上传 download from server only 仅仅从服务器下载
谷歌 chrome 只有一种 双向同步
开始做，坚持做，重复做