I don't remember seeing an Encryption tab there in recent years. What information are you looking for on that tab? It's probably available somewhere else.

If you want to know about the current page, click the padlock in the address bar, then More Information to call up the Security panel of the Page Info dialog. There you can get the details on the certificate used by the site.

There is no Encryption tab in current Firefox releases.

Current Firefox releases no longer have a user interface setting to disable TLS or SSL3 and you have to make the change on the about:config page and modify two prefs.
SSL3 is enabled by default in the current Firefox release (security.tls.version.min = 0) and TLS versions up to TLS 1.2 (security.tls.version.max = 3).

You can modify the security.tls.version.min and security.tls.version.max prefs to set which TLS versions are enabled.

You may need to close and restart Firefox after changing these prefs.

security.tls.version.min = 0 (1 will disable SSL3 and only enable TLS)
security.tls.version.max = 2 (0 will disable TLS 1.0 and higher, leaving only SSL3 enabled)

• http://kb.mozillazine.org/security.tls.version.*

0 means SSL 3.0, 1 means TLS 1.0, 2 means TLS 1.1, 3 means TLS 1.2 etc.

jscher2000 wrote:

I don't remember seeing an Encryption tab there in recent years.

It was taken out in Firefox 23, released August 6th 2013 (bug 733632).

• http://limi.net/checkboxes-that-kill