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How to force enable TLS1.3 in Firefox

  • 2 uphendule
  • 1 inale nkinga
  • Igcine ukuphendulwa ngu f20170099

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When I try to access: via Firefox I can check using Wireshark that the connection request being sent is TLSv1.2. How do I force the TLS1.3 connection in Firefox Someone, please let me know.

This website is hosted behind Cloudflare, and thus supports TLS1.3 (I have verified this using a TLS1.3 client).

All Replies (2)

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Do you otherwise have issues with using TLS 1.3 ?

You can check your browser.

Are you using Firefox from the Mozilla server or Firefox from the repositories of your Linux distribution in case that makes a difference ?


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Hi, @cor-el,

I opened Google on firefox and checked using wireshark, I can verify that my firefox supports and makes TLS 1.3 calls.

Even with your ssllabs link, I get:

Your user agent has good protocol support. Your user agent supports TLS 1.2 and TLS 1.3, which are recommended protocol version at the moment.

I am not sure about its source. Does it make a difference?

Can you please let me know if there's a way to force firefox to make TLS1.3 connection only when trying to connect to my site? I have verified that my website supports TLS1.3.


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