状況
Still waiting to connect to Firefox
が出続けます。
原因
Firefox 側が原因です。Cypress チームも調査中とのこと。
@cgraham-rs thanks for confirming our suspicions. We are going to check with firefox to see if they are aware of this issue. I would encourage you to do the same. I will close this issue since this appears to be a problem on the firefox side.
https://github.com/cypress-io/cypress/issues/23897#issuecomment-1255388422
どうすればいいか
待つ。