Is there a way I can activate SSL 3 in the latest version of Firefox. I have an old HP remote insight card, that I use to control my server, and now I can not access that card any more. Edit the "security.tls.version.min" in about:config does not help. The information here is not helpful at all: Unable to Connect Securely Firefox cannot guarantee the safety of your data on 192.168.20.7 because it uses SSLv3, a broken security protocol. Advanced info: ssl_error_unsupported_version "If you see this message, please contact the website owner to let them know about the problem." I'm the owner, but how can I change this ? It is of cause impossible, and I do not expect HP to edit a maybe 15 year old SW. This website is of no help to me: https://support.mozilla.org/en-US/kb/what-do-sslv3-error-messages-mean-firefox?redirectlocale=en-US&redirectslug=how-resolve-sslv3-error-messages-firefox I need a way to allow Firefox to access my Remote Insight. Is downgrade Firefox the only option ? Which version ? And where to find it ? This blog does not say if its possible nor not to activate SSL 3 or not: https://blog.mozilla.org/security/2014/10/14/the-poodle-attack-and-the-end-of-ssl-3-0/