Performing a TLS handshake to www.firefox.net.cn...

经常连不上，连不上时就一直提示这个，，过一会就
Secure Connection Failed
The connection to the server was reset while the page was loading.
    The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
    Please contact the website owners to inform them of this problem.

挂代理就一切正常。