从https://download.seafile.top/d/a72596f6fe/这里下载的 seafile-manual-cn.pdf 中文手册描述如如下，浏览器方式是支持javaScript加解密的，但是在英文版手册中又说不支持，明显是矛盾的。
但是在英文版手册（https://manual.seafile.com/security/security_features.html）中却说：
CAUTION: The client side encryption does currently NOT work while using the web browser and the cloud file explorer of the desktop client. When you are browsing encrypted libraries via the web browser or the cloud file explorer, you need to input the password and the server is going to use the password to decrypt the “file key” for the library (see description below) and cache the password in memory for one hour. The plain text password is never stored or cached on the server.