I type my credentials, then get redirected to the Cloudflare page, pass the test, then get redirected again to https://chat.openai.com/auth/login, unconnected.
I tried to inspect the request but got nothing. I also tried to put a wrong password with exactly the same result.
The only solution I found was to connect from Safari and copy every session cookie from Safari to FF, which worked very well (to my biggest surprise! I thought modern session cookies would be tied to a browser?).
Anyone else having the same issue?