[🐛 Bug]: uploadFile command not available in Firefox since Selenium Docker image 4.31.0

[lacell75]

What happened?

I'm encountering an issue with the uploadFile command when using Firefox in Docker Selenium images, starting from version 4.31.0.

When running WebdriverIO tests that rely on the uploadFile command with Firefox (inside the Docker Selenium container), the following error is returned:

Error: The uploadFile command is not available in firefox

This was working correctly in previous Docker image versions (e.g., 4.30.x). The issue does not occur with Chrome—only with Firefox.

I'm using the remote.uploadFile() WebDriver command to simulate file uploads in Firefox.

The same codebase works fine with Chrome.

It seems like a regression introduced in or after 4.31.0.

I opened an Issue in wdio repo webdriverio#14395

Command used to start Selenium Grid with Docker (or Kubernetes)

services:
    - name: selenium/standalone-firefox:latest
      alias: selenium

Relevant log output

[firefox 140.0.4 linux #0-3] Error: The uploadFile command is not available in firefox
[firefox 140.0.4 linux #0-3] Error: The uploadFile command is not available in firefox
[firefox 140.0.4 linux #0-3]     at Browser.uploadFile (/e2e/node_modules/webdriverio/build/node.js:119:11)
[firefox 140.0.4 linux #0-3]     at Browser.uploadFile2 (/e2e/node_modules/webdriverio/build/node.js:5611:39)
[firefox 140.0.4 linux #0-3]     at Browser.wrapCommandFn (/e2e/node_modules/@wdio/utils/build/index.js:978:32)

Operating System

linux

Docker Selenium version (image tag)

4.31.0 and above

Selenium Grid chart version (chart version)

No response

[github-actions[bot]]

@lacell75, thank you for creating this issue. We will troubleshoot it as soon as we can.

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Thank you!

[VietND96]

Updated: I feel this is an issue with Firefox version or Geckodriver. Checking further.

[VietND96]

In ticket, I saw you mentioned that it happens since Firefox 137. So, can you try this standalone image with a combination of Grid 4.34 and Firefox 136. selenium/standalone-firefox:136.0-geckodriver-0.36-grid-4.34.0-20250707 If it can work, then issue not with Grid version.

[lacell75]

In ticket, I saw you mentioned that it happens since Firefox 137. So, can you try this standalone image with a combination of Grid 4.34 and Firefox 136. selenium/standalone-firefox:136.0-geckodriver-0.36-grid-4.34.0-20250707 If it can work, then issue not with Grid version.

I have the same error with this version firefox 136 with grid 4.34.0

[firefox 136.0.4 linux #0-3] Error: The uploadFile command is not available in firefox
[firefox 136.0.4 linux #0-3] Error: The uploadFile command is not available in firefox
[firefox 136.0.4 linux #0-3]     at Browser.uploadFile (/e2e/node_modules/webdriverio/build/node.js:119:11)
[firefox 136.0.4 linux #0-3]     at Browser.uploadFile2 (/e2e/node_modules/webdriverio/build/node.js:5611:39)
[firefox 136.0.4 linux #0-3]     at Browser.wrapCommandFn (/e2e/node_modules/@wdio/utils/build/index.js:978:32)
[firefox 136.0.4 linux #0-3]     at fileUpload (/e2e/src/support/action/fileUpload.ts:142:28)
[firefox 136.0.4 linux #0-3]     at World.createKit (/e2e/src/support/action/createKit.ts:29:3)

[VietND96]

Okay, what is Webdriverio version used? Latest one?

[VietND96]

I guess could be due to to this cap 'wdio:enforceWebDriverClassic': true, Can you remove this?

[lacell75]

Yes, the latest version.

Le ven. 11 juil. 2025 à 19:31, Viet Nguyen Duc @.***> a écrit :

VietND96 left a comment (SeleniumHQ/docker-selenium#2896) https://github.com/SeleniumHQ/docker-selenium/issues/2896#issuecomment-3063166685

Okay, what is Webdriverio version used? Latest one?

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[lacell75]

I guess could be due to to this cap 'wdio:enforceWebDriverClassic': true, Can you remove this?

Hi @VietND96, same error if I remove this cap.

[firefox 141.0 linux #0-0] Error: The uploadFile command is not available in firefox
[firefox 141.0 linux #0-0] Error: The uploadFile command is not available in firefox
[firefox 141.0 linux #0-0]     at Browser.uploadFile (C:\2-gitlab\insight\quality\end-to-end-tests-wdio\node_modules\webdriverio\build\node.js:119:11)
[firefox 141.0 linux #0-0]     at Browser.uploadFile2 (C:\2-gitlab\insight\quality\end-to-end-tests-wdio\node_modules\webdriverio\build\node.js:5611:39)
[firefox 141.0 linux #0-0]     at Browser.wrapCommandFn (C:\2-gitlab\insight\quality\end-to-end-tests-wdio\node_modules\@wdio\utils\build\index.js:978:32)
[firefox 141.0 linux #0-0]     at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
[firefox 141.0 linux #0-0]     at async World.contractUpload (C:\2-gitlab\insight\quality\end-to-end-tests-wdio\src\support\action\contract-upload\index.ts:967:26)