What do the SSLv3 error messages mean on Firefox?
Firefox blocks Secure Sockets Layer version 3.0 (SSLv3) to protect your information from attacks. SSLv3 is a type of technology that some websites use to connect to a server. It is no longer secure, which makes it easy for hackers to extract your personal information during a connection. For more information, see Fix Firefox Error What happens when you access vulnerable sites When you try to access a site that only supports Secure Sockets Layer version 3.0 (SSLv3), Firefox blocks it and displays a message, Unable to Connect Securely , explaining that Firefox cannot guarantee the safety of your data on that website because it uses SSLv3, a broken security protocol. If you see this message, please contact the website owner to let them know about the problem. Additional precautions To further protect yourself from attacks, keep Firefox up to date. The simplest way to do this is to set up automatic updates: Click the menu button and select Options ...