It's probably still missing a lot features NSS supports and Firefox needs for backward compatibility and enterprise use-cases. As far as I know NSS does slightl

It's probably still missing a lot features NSS supports and Firefox needs for backward compatibility and enterprise use-cases. As far as I know NSS does slightly more then "just" TLS. Also rustls not supporting certain legacy/less secure settings can be a problem. Generally its a good idea, but sometimes you have to things like the "communicate with embedded hardware which can only do that probably backdoored eleptic curve in hardware and is too slow to do other curves in software" situation.. Through for a very high amount of use-cases this doesn't matter and rustls feature set has everything you need.