Error after running a test using the Firefox browser on the CLI in Windows.

[Lorenzras]

Current behavior

Using the commandline, test itself succeeds but throws the following error.

[firefox-profile] cannot delete profileDir on exit

Here is what we did so far to no avail.

1. Delete node_modules, then reinstall packages.
2. Clone the test repository on a different Windows computer.

Desired behavior

No response

Test code to reproduce

I was able to reproduce it with sample repo .

npx cypress run --browser firefox

Cypress Version

13.17.0

Node version

v20.10.0

Operating System

Windows 11 Pro

Debug Logs

npx cypress run --browser firefox

[firefox-profile] cannot delete profileDir on exit C:\Users\raslo\AppData\Roaming\Cypress\cy\production\browsers\firefox-stable\run-8308 Error: EPERM: operation not permitted, unlink '\\?\C:\Users\raslo\AppData\Roaming\Cypress\cy\production\browsers\firefox-stable\run-8308\rust_mozprofilefECWUR\cookies.sqlite-shm'
    at unlinkSync (node:fs:1883:3)
    at _unlinkSync (node:internal/fs/rimraf:214:14)
    at unlinkSync (node:fs:1883:3)
    at _unlinkSync (node:internal/fs/rimraf:214:14)
    at fixWinEPERMSync (node:internal/fs/rimraf:306:5)
    at rimrafSync (node:internal/fs/rimraf:200:14)
    at node:internal/fs/rimraf:253:9
    at Array.forEach (<anonymous>)
    at _rmdirSync (node:internal/fs/rimraf:250:7)
    at fixWinEPERMSync (node:internal/fs/rimraf:304:5)
    at rimrafSync (node:internal/fs/rimraf:200:14)
    at node:internal/fs/rimraf:253:9
    at Array.forEach (<anonymous>)
    at _rmdirSync (node:internal/fs/rimraf:250:7)
    at fixWinEPERMSync (node:internal/fs/rimraf:304:5)
    at rimrafSync (node:internal/fs/rimraf:200:14)
    at Object.rmSync (node:fs:1278:10)
    at v._cleanOnExit (<embedded>:777:119095)
    at process.onExit (<embedded>:777:117974)
    at process.emit (node:events:526:35)
    at App.<anonymous> (node:electron/js2c/browser_init:2:119065)
    at App.emit (node:events:514:28)
    at b (<embedded>:3031:2271)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
  errno: -4048,
  syscall: 'unlink',
  code: 'EPERM',
  path: '\\\\?\\C:\\Users\\raslo\\AppData\\Roaming\\Cypress\\cy\\production\\browsers\\firefox-stable\\run-8308\\rust_mozprofilefECWUR\\cookies.sqlite-shm'
}

Other

There was no problem running on Mac or in GUI mode.

[MikeMcC399]

@Lorenzras

In your screenshot Windows is showing an issue because the resource is busy. You may want to reboot your system and see if that clears the issue.

[YukeySnowHarry]

I have encountered the similar issue from chrome, and I deleted this file and launch cypress again, it is normal now.

[MikeMcC399]

• This issue is also reported in Cypress cannot open firefox - getaddrinfo EAI_AGAIN error #31230

I am seeing it as well on Windows 11 24H2 with Cypress 14.1.0, Node.js 22.14.0 LTS and Firefox 136.0 and if I simply execute

npx cypress run -b firefox

If I repeatedly execute the above command, sometimes there is an error, sometimes there is no error. This is a sporadic issue.

On repeat runs, the directory and filename changes each time:

\AppData\Roaming\Cypress\cy\production\browsers\firefox-stable\run-4424\rust_mozprofileMwXaVr\cert9.db
\AppData\Roaming\Cypress\cy\production\browsers\firefox-stable\run-17760\rust_mozprofiledBbG19\favicons.sqlite-shm
\AppData\Roaming\Cypress\cy\production\browsers\firefox-stable\run-15560\rust_mozprofilefihkhd\favicons.sqlite-shm
\AppData\Roaming\Cypress\cy\production\browsers\firefox-stable\run-17056\rust_mozprofilexCXXUB\favicons.sqlite-shm

In each case, the error message is similar to the one in the original report, for example:

[firefox-profile] cannot delete profileDir on exit C:\Users\mikem\AppData\Roaming\Cypress\cy\production\browsers\firefox-stable\run-17056 Error: EPERM: operation not permitted, unlink 'C:\Users\mikem\AppData\Roaming\Cypress\cy\production\browsers\firefox-stable\run-17056\rust_mozprofilexCXXUB\favicons.sqlite-shm'

[MikeMcC399]

Steps to reproduce

The following fails sporadically on Windows 11 24H2 (Node.js 22.14.0 LTS), running Cypress 14.2.0 10 times against Firefox 136.0.1:

git clone --branch firefox-profile https://github.com/MikeMcC399/cypress-test-tiny
cd cypress-test-tiny
npm ci
./firefox-loop.sh

On Ubuntu 24.04.2 LTS there are no failures.

[MikeMcC399]

@Lorenzras

• I have duplicated this issue in "[firefox-profile] cannot delete profileDir on exit" sporadic issue on Windows #31324 just to provide a fuller step of repro steps with a current version including debug logs

From what I can see, Cypress is having sporadic problems to delete a temporary Firefox profile on Windows. It doesn't happen all the time and it doesn't stop Cypress from working.