Unexpected error while setting cookie in Firefox

Current behavior

We have dozens of Cypress test suites that we’ve been running for years in Chrome. I recently tried running these same tests in Firefox and Cypress is failing really early on:

13:23:56       CypressError: `cy.setCookie()` had an unexpected error setting the requested cookie in Firefox.
13:23:56  
13:23:56  > Error: An unexpected error occurred
13:23:56  
13:23:56  
13:23:56  https://on.cypress.io/setcookie
13:23:56  
13:23:56  Because this error occurred during a `before all` hook we are skipping the remaining tests in the current suite: `Topology > Export`
13:23:56  
13:23:56  Although you have test retries enabled, we do not retry tests when `before all` or `after all` hooks fail
13:23:56    handleBackendError/<@http://localhost:4001/__cypress/runner/cypress_runner.js:136770:17
13:23:56    tryCatcher@http://localhost:4001/__cypress/runner/cypress_runner.js:10798:23
13:23:56    ../../node_modules/bluebird/js/release/promise.js/</module.exports/Promise.prototype._settlePromiseFromHandler@http://localhost:4001/__cypress/runner/cypress_runner.js:8733:31
13:23:56    ../../node_modules/bluebird/js/release/promise.js/</module.exports/Promise.prototype._settlePromise@http://localhost:4001/__cypress/runner/cypress_runner.js:8790:18
13:23:56    ../../node_modules/bluebird/js/release/promise.js/</module.exports/Promise.prototype._settlePromise0@http://localhost:4001/__cypress/runner/cypress_runner.js:8835:10
13:23:56    ../../node_modules/bluebird/js/release/promise.js/</module.exports/Promise.prototype._settlePromises@http://localhost:4001/__cypress/runner/cypress_runner.js:8911:18
13:23:56    _drainQueueStep@http://localhost:4001/__cypress/runner/cypress_runner.js:5505:12
13:23:56    _drainQueue@http://localhost:4001/__cypress/runner/cypress_runner.js:5498:24
13:23:56    ../../node_modules/bluebird/js/release/async.js/</Async.prototype._drainQueues@http://localhost:4001/__cypress/runner/cypress_runner.js:5514:16
13:23:56    Async/this.drainQueues@http://localhost:4001/__cypress/runner/cypress_runner.js:5384:14
13:23:56    From Your Spec Code:
13:23:56        @http://localhost:4001/__cypress/tests?p=cypress/support/index.js:967:246652
13:23:56        runCommand/<@http://localhost:4001/__cypress/runner/cypress_runner.js:150999:15
13:23:56        tryCatcher@http://localhost:4001/__cypress/runner/cypress_runner.js:10798:23
13:23:56        ../../node_modules/bluebird/js/release/promise.js/</module.exports/Promise.prototype._settlePromiseFromHandler@http://localhost:4001/__cypress/runner/cypress_runner.js:8733:31
13:23:56        ../../node_modules/bluebird/js/release/promise.js/</module.exports/Promise.prototype._settlePromise@http://localhost:4001/__cypress/runner/cypress_runner.js:8790:18
13:23:56        ../../node_modules/bluebird/js/release/promise.js/</module.exports/Promise.prototype._settlePromiseCtx@http://localhost:4001/__cypress/runner/cypress_runner.js:8827:10
13:23:56        _drainQueueStep@http://localhost:4001/__cypress/runner/cypress_runner.js:5509:12
13:23:56        _drainQueue@http://localhost:4001/__cypress/runner/cypress_runner.js:5498:24
13:23:56        ../../node_modules/bluebird/js/release/async.js/</Async.prototype._drainQueues@http://localhost:4001/__cypress/runner/cypress_runner.js:5514:16
13:23:56        Async/this.drainQueues@http://localhost:4001/__cypress/runner/cypress_runner.js:5384:14
13:23:56    
13:23:56    
13:23:56    From Node.js Internals:
13:23:56      Error: An unexpected error occurred
13:23:56          (No stack trace)
13:23:56      From previous event:
13:23:56          setCookie@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:20589:20
13:23:56          invoke/<@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:20484:33
13:23:56      From previous event:
13:23:56          invoke@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:20483:20
13:23:56          connect/<@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:20499:16
13:23:56          ../../node_modules/component-emitter/index.js/Emitter.prototype.emit@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:6122:20
13:23:56          emit@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:19835:15
13:23:56          emitEvent@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:19580:20
13:23:56          onevent@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:19567:18
13:23:56          onpacket@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:19531:22
13:23:56          ../../node_modules/component-emitter/index.js/Emitter.prototype.emit@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:6122:20
13:23:56          emitReserved@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:19848:15
13:23:56          ondecoded@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:19115:14
13:23:56          ../../node_modules/component-emitter/index.js/Emitter.prototype.emit@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:6122:20
13:23:56          add@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:20173:23
13:23:56          ondata@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:19107:22
13:23:56          ../../node_modules/component-emitter/index.js/Emitter.prototype.emit@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:6122:20
13:23:56          onPacket@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:16987:16
13:23:56          setTransport/<@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:16796:14
13:23:56          ../../node_modules/component-emitter/index.js/Emitter.prototype.emit@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:6122:20
13:23:56          onPacket@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:17389:10
13:23:56          onData@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:17382:10
13:23:56          addEventListeners/this.ws.onmessage@moz-extension://dd4d2926-1481-4183-b953-89dd9f94b570/background.js:18379:36

I checked the debug logs and I don’t see a lot there:

2021-06-26T20:30:26.936Z cypress:server:socket-base automation:request get:cookies { domain: 'localhost' }
2021-06-26T20:30:26.937Z cypress:server:socket-base backend:request { eventName: 'reset:server:state', args: [] }
2021-06-26T20:30:26.937Z cypress:proxy:http:util:buffers resetting buffers
2021-06-26T20:30:26.937Z cypress:server:automation:cookies getting:cookies { domain: 'localhost' }
2021-06-26T20:30:26.950Z cypress:server:automation:cookies received get:cookies []
2021-06-26T20:30:26.993Z cypress:server:socket-base automation:request set:cookie { name: 'access_token', value: '', path: '/', secure: true, httpOnly: false, expiry: 2255891426, domain: 'mock', sameSite: 'no_restriction' }
2021-06-26T20:30:26.994Z cypress:server:automation:cookies set:cookie { name: 'access_token', value: '', path: '/', domain: 'mock', secure: true, httpOnly: false, sameSite: 'no_restriction', expirationDate: 2255891426, url: 'https://mock/' }

The next log message concerns taking a screenshot (because the test has been marked as failed).

Desired behavior

We should be able to set cookies in Firefox.

Test code to reproduce

  cy.setCookie('access_token', Cypress.env('accessToken'), {
    domain: getApiServerDomain(),
    sameSite: 'no_restriction',
    secure: true,
  })

Versions

Cypress 7.5.0 running on Debian 9 in a Docker environment with Firefox 88

[kaiyoma]

I did some digging here today and I think I found the issue. Leaving a note in case anyone else runs into this in the future:

The problem here was related to the domain property in the setCookie options. Namely, I was trying to set an invalid domain (in this case, "mock") and that seemed to be causing the failure. I would have appreciated some more details in the error message.

[iriikoad]

Hi I’m having the same error with session when the restore:

 (No stack trace)
    setOneCookie@moz-extension://e1a58d4f-b345-4a26-b89b-f015535bd5e1/background.js:20629:18
    setCookies@moz-extension://e1a58d4f-b345-4a26-b89b-f015535bd5e1/background.js:20685:20
    ./app/background.js/connect/invoke/<@moz-extension://e1a58d4f-b345-4a26-b89b-f015535bd5e1/b