Hi Julien, I think it's too early to say definitively whether there will be a changeable preference to allow Firefox to use older versions of the TLS protocol after that date. I assume there will be, at least for a while.

Some companies that can't upgrade their servers may need to migrate to the Extended Support Release of Firefox 68 if there isn't an option in the regular release.

See also:

• https://www.fxsitecompat.dev/en-CA/do.../tls-1-0-and-1-1-are-now-deprecated-disabled-in-nightly/
• https://groups.google.com/forum/#!topic/mozilla.dev.platform/8EFRYDR3N1c/discussion

• bug 1579285 - Offer to re-enable TLS 1.0 and 1.1 on TLS version failure [71]
• bug 1579270 - Disable TLS 1.0 and 1.1 for Nightly [71] (not for Release)

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