Is there a way to make Firefox autoredirect to that?
https://einaregilsson.com/redirector/
Include pattern:
^https?://x.com/(.*)
https://xxcancel.com/$1
Libredirect does exactly that: https://github.com/libredirect/browser_extension
Probably with some userscript?
https://einaregilsson.com/redirector/
Include pattern:
Redirect to: