There's a more general list available here: https://codeberg.org/mv12star/shitter/wiki/Instances

I put this together this morning:

https://github.com/gavinhungry/nitter-bitter

You can self-host it anywhere, and use the aforementioned Redirector [1] extension:

    ^https://(?:twitter|x)\.com/(.*)
    https://nitter.example.tld/$1

[1] https://einaregilsson.com/redirector/

Is there a way to make Firefox autoredirect to that?

Also twiiit.com