Hi,

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Do you mean that you need to connect to a site that uses TLS 1.1 or TLS 1.0, which Firefox does not support in its default configuration? You can test whether the following setting still works for you (thread from when Firefox 133 was the current release):

https://support.mozilla.org/en-US/questions/1480936#answer-1699631

TLS 1.0 and TLS 1.1 have been deprecated since Firefox 78 Release and should not be used now days and only enable temporarily if you do.

https://blog.mozilla.org/security/2018/10/15/removing-old-versions-of-tls/ https://hacks.mozilla.org/2020/02/its-the-boot-for-tls-1-0-and-tls-1-1/