Completely cripples Firefox when behind a VPN. Many websites will not load and either hang at "TLS handshake" or claim the connection is not secure. One of the worst options available. Their support is abysmal and it wasn't until I mentioned in the issues Github that I would be escalating my concerns to my state's Attorney General for fraud did they do their jobs and look at a ticket that was sitting there for 20 days. Look elsewhere.