Firefox v105 not working for runner/headless

Current behavior

Currently FFv105 will not open and times out when attempting to run specs in the runner and also running specs in headless.

Desired behavior

FF browser should not timeout and user should be able to run specs in the FF browser

Test code to reproduce

no test code needed just try to open FFv105 and run spec or use the cli to run a headless test

Cypress Version

10.9.0

Node version

v14.16.1

Operating System

mac 12.4 Monterey

Debug Logs

cypress:server:cypress exiting with err Error: connect ECONNREFUSED 127.0.0.1:55248
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1157:16)
 {
  isCypressErr: true,
  type: 'FIREFOX_COULD_NOT_CONNECT',
  details: 'Error: connect ECONNREFUSED 127.0.0.1:55248\n' +
    '    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1157:16)\n',
  messageMarkdown: 'Cypress failed to make a connection to Firefox.\n' +
    '\n' +
    'This usually indicates there was a problem opening the Firefox browser.',
  originalError: Error: connect ECONNREFUSED 127.0.0.1:55248
      at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1157:16)
   {
    isCypressErr: true,
    type: 'CDP_COULD_NOT_CONNECT',
    details: 'Error: connect ECONNREFUSED 127.0.0.1:55248\n' +
      '    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1157:16)\n',
    messageMarkdown: 'Cypress failed to make a connection to the Chrome DevTools Protocol after retrying for 50 seconds.\n' +
      '\n' +
      'This usually indicates there was a problem opening the Firefox browser.\n' +
      '\n' +
      'The CDP port requested was `55248`.',
    originalError: OperationalError: connect ECONNREFUSED 127.0.0.1:55248
        at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1157:16)
     {
      cause: [Error],
      isOperational: true,
      errno: -61,
      code: 'ECONNREFUSED',
      syscall: 'connect',
      address: '127.0.0.1',
      port: 55248
    },
    stackWithoutMessage: '    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1157:16)\n'
  },
  stackWithoutMessage: '    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1157:16)\n'
} +53s
Cypress failed to make a connection to Firefox.

This usually indicates there was a problem opening the Firefox browser.

Error: connect ECONNREFUSED 127.0.0.1:55248
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1157:16)

Other

No response

[nagash77]

Hello @brentsharon , We have a fix for a problem that appeared after firefox made a change to how they resolve localhost. https://github.com/cypress-io/cypress/issues/23897 will be releasing today in Cypress 10.10.0. Can you please try upgrading to that version of Cypress and seeing if that resolves the issue?

[amehta265]

Right now there doesn’t seem to be enough information to reproduce the problem on our end. We’ll have to close this issue until we can reproduce it. This does not mean that your issue is not happening - it just means that we do not have a path to move forward.

Please open a new issue with a reproducible example and link to this issue. Here are some tips for providing a Short, Self Contained, Correct, Example and our own Troubleshooting Cypress guide.