Playwright 1.51 (JS) breaks with "method 'Browser.setContrast' is not supported" #230

B4nan · 2025-03-07T12:59:03Z

B4nan
Mar 7, 2025

Hi there, we recently added support for camoufox in the JS land via https://github.com/apify/camoufox-js (basically a port of your python scripts to prepare the launch arguments). Yesterday, there was a new playwright version released (https://github.com/microsoft/playwright/releases/tag/v1.51.0) which broke things for us. I don't see a python equivalent yet, but I would expect they will port those changes to python playwright soon too - so I am opening this just as a discussion to let you know.

Here is the error:

ERROR Failed to launch browser. Please check the following:
- Check whether the provided executable path "/home/runner/.cache/camoufox/camoufox-bin" is correct.
- Try installing the required dependencies by running `npx playwright install --with-deps` (https://playwright.dev/docs/browsers).
The original error is available in the `cause` property. Below is the error received when trying to launch a browser:

  Failed to launch browser. Please check the following:
- Check whether the provided executable path "/home/runner/.cache/camoufox/camoufox-bin" is correct.
- Try installing the required dependencies by running `npx playwright install --with-deps` (https://playwright.dev/docs/browsers).
The original error is available in the `cause` property. Below is the error received when trying to launch a browser:

  - Check whether the provided executable path "/home/runner/.cache/camoufox/camoufox-bin" is correct.
  - Try installing the required dependencies by running `npx playwright install --with-deps` (https://playwright.dev/docs/browsers).
  
  The original error is available in the `cause` property. Below is the error received when trying to launch a browser:
  
  browserType.launchPersistentContext: Protocol error (Browser.setContrast): ERROR: method 'Browser.setContrast' is not supported
  Call log:
    - <launching> /home/runner/.cache/camoufox/camoufox-bin -no-remote -headless -profile /tmp/playwright_firefoxdev_profile-3LM8iE -juggler-pipe about:blank
    - <launched> pid=5775
    - [pid=5775][err] *** You are running in headless mode.
    - [pid=5775][out] [GFX1-]: FireTestProcess failed: Failed to spawn child process “/home/runner/.cache/camoufox/glxtest” (No such file or directory)
    - [pid=5775][out]
    - [pid=5775][err] JavaScript warning: resource://services-settings/Utils.sys.mjs, line 57: unreachable code after return statement
    - [pid=5775][err] JavaScript warning: resource://services-settings/Utils.sys.mjs, line 119: unreachable code after return statement
    - [pid=5775][out] Crash Annotation GraphicsCriticalError: |[0][GFX1-]: glxtest: ManageChildProcess failed
    - [pid=5775][out]  (t=0.59007) [GFX1-]: glxtest: ManageChildProcess failed
    - [pid=5775][out]
    - [pid=5775][out] Crash Annotation GraphicsCriticalError: |[0][GFX1-]: glxtest: ManageChildProcess failed
    - [pid=5775][out]  (t=0.59007) |[1][GFX1-]: No GPUs detected via PCI
    - [pid=5775][out]  (t=0.59007) [GFX1-]: No GPUs detected via PCI
    - [pid=5775][out]
    - [pid=5775][err] DEBUG: Juggler pipe initialized
    - [pid=5775][err] DEBUG: Dispatcher created
    - [pid=5775][err] DEBUG: BrowserHandler created
    - [pid=5775][err] DEBUG: BrowserHandler set as root session handler
    - [pid=5775][out]
    - [pid=5775][out] Juggler listening to the pipe
    - [pid=5775][out] console.error: "Ignoring protocol handler for mailto without a uriTemplate!"
    - [pid=5775][out]
    - [pid=5775][out]         ERROR: ERROR: method 'Browser.setContrast' is not supported _dispatch@chrome://juggler/content/protocol/Dispatcher.js:71:15
    - [pid=5775][out] receiveMessage@chrome://juggler/content/components/Juggler.js:121:20
    - [pid=5775][out]
  
      at async PlaywrightPlugin._launch (/home/runner/work/crawlee/crawlee/packages/browser-pool/dist/playwright/playwright-plugin.js:106:40)
      at async BrowserPool._launchBrowser (/home/runner/work/crawlee/crawlee/packages/browser-pool/dist/browser-pool.js:482:29)
      at async /home/runner/work/crawlee/crawlee/packages/browser-pool/dist/browser-pool.js:[28](https://github.com/apify/crawlee/actions/runs/13712422089/job/38361109957#step:12:29)7:37
  Error thrown at:
  
      at PlaywrightPlugin._throwAugmentedLaunchError (/home/runner/work/crawlee/crawlee/packages/browser-pool/dist/abstract-classes/browser-plugin.js:153:15)
      at PlaywrightPlugin._throwOnFailedLaunch (/home/runner/work/crawlee/crawlee/packages/browser-pool/dist/playwright/playwright-plugin.js:167:14)
      at /home/runner/work/crawlee/crawlee/packages/browser-pool/dist/playwright/playwright-plugin.js:109:33
      at async PlaywrightPlugin._launch (/home/runner/work/crawlee/crawlee/packages/browser-pool/dist/playwright/playwright-plugin.js:106:40)
      at async BrowserPool._launchBrowser (/home/runner/work/crawlee/crawlee/packages/browser-pool/dist/browser-pool.js:482:[29](https://github.com/apify/crawlee/actions/runs/13712422089/job/38361109957#step:12:30))
      at async /home/runner/work/crawlee/crawlee/packages/browser-pool/dist/browser-pool.js:287:37
    CAUSE: browserType.launchPersistentContext: Protocol error (Browser.setContrast): ERROR: method 'Browser.setContrast' is not supported
  Call log:
    - <launching> /home/runner/.cache/camoufox/camoufox-bin -no-remote -headless -profile /tmp/playwright_firefoxdev_profile-3LM8iE -juggler-pipe about:blank
    - <launched> pid=5775
    - [pid=5775][err] *** You are running in headless mode.
    - [pid=5775][out] [GFX1-]: FireTestProcess failed: Failed to spawn child process “/home/runner/.cache/camoufox/glxtest” (No such file or directory)
    - [pid=5775][out]
    - [pid=5775][err] JavaScript warning: resource://services-settings/Utils.sys.mjs, line 57: unreachable code after return statement
    - [pid=5775][err] JavaScript warning: resource://services-settings/Utils.sys.mjs, line 119: unreachable code after return statement
    - [pid=5775][out] Crash Annotation GraphicsCriticalError: |[0][GFX1-]: glxtest: ManageChildProcess failed
    - [pid=5775][out]  (t=0.59007) [GFX1-]: glxtest: ManageChildProcess failed
    - [pid=5775][out]
    - [pid=5775][out] Crash Annotation GraphicsCriticalError: |[0][GFX1-]: glxtest: ManageChildProcess failed
    - [pid=5775][out]  (t=0.59007) |[1][GFX1-]: No GPUs detected via PCI
    - [pid=5775][out]  (t=0.59007) [GFX1-]: No GPUs detected via PCI
    - [pid=5775][out]
    - [pid=5775][err] DEBUG: Juggler pipe initialized
    - [pid=5775][err] DEBUG: Dispatcher created
    - [pid=5775][err] DEBUG: BrowserHandler created
    - [pid=5775][err] DEBUG: BrowserHandler set as root session handler
    - [pid=5775][out]
    - [pid=5775][out] Juggler listening to the pipe
    - [pid=5775][out] console.error: "Ignoring protocol handler for mailto without a uriTemplate!"
    - [pid=5775][out]
    - [pid=5775][out]         ERROR: ERROR: method 'Browser.setContrast' is not supported _dispatch@chrome://juggler/content/protocol/Dispatcher.js:71:15
    - [pid=5775][out] receiveMessage@chrome://juggler/content/components/Juggler.js:121:20
    - [pid=5775][out]
  
      Call log:
        - <launching> /home/runner/.cache/camoufox/camoufox-bin -no-remote -headless -profile /tmp/playwright_firefoxdev_profile-3LM8iE -juggler-pipe about:blank
        - <launched> pid=5775
        - [pid=5775][err] *** You are running in headless mode.
        - [pid=5775][out] [GFX1-]: FireTestProcess failed: Failed to spawn child process “/home/runner/.cache/camoufox/glxtest” (No such file or directory)
        - [pid=5775][out]
        - [pid=5775][err] JavaScript warning: resource://services-settings/Utils.sys.mjs, line 57: unreachable code after return statement
        - [pid=5775][err] JavaScript warning: resource://services-settings/Utils.sys.mjs, line 119: unreachable code after return statement
        - [pid=5775][out] Crash Annotation GraphicsCriticalError: |[0][GFX1-]: glxtest: ManageChildProcess failed
        - [pid=5775][out]  (t=0.59007) [GFX1-]: glxtest: ManageChildProcess failed
        - [pid=5775][out]
        - [pid=5775][out] Crash Annotation GraphicsCriticalError: |[0][GFX1-]: glxtest: ManageChildProcess failed
        - [pid=5775][out]  (t=0.59007) |[1][GFX1-]: No GPUs detected via PCI
        - [pid=5775][out]  (t=0.59007) [GFX1-]: No GPUs detected via PCI
        - [pid=5775][out]
        - [pid=5775][err] DEBUG: Juggler pipe initialized
        - [pid=5775][err] DEBUG: Dispatcher created
        - [pid=5775][err] DEBUG: BrowserHandler created
        - [pid=5775][err] DEBUG: BrowserHandler set as root session handler
        - [pid=5775][out]
        - [pid=5775][out] Juggler listening to the pipe
        - [pid=5775][out] console.error: "Ignoring protocol handler for mailto without a uriTemplate!"
        - [pid=5775][out]
        - [pid=5775][out]         ERROR: ERROR: method 'Browser.setContrast' is not supported _dispatch@chrome://juggler/content/protocol/Dispatcher.js:71:15
        - [pid=5775][out] receiveMessage@chrome://juggler/content/components/Juggler.js:121:20
        - [pid=5775][out]
      
          at async PlaywrightPlugin._launch (/home/runner/work/crawlee/crawlee/packages/browser-pool/dist/playwright/playwright-plugin.js:106:40)
          at async BrowserPool._launchBrowser (/home/runner/work/crawlee/crawlee/packages/browser-pool/dist/browser-pool.js:482:29)
          at async /home/runner/work/crawlee/crawlee/packages/browser-pool/dist/browser-pool.js:287:[37](https://github.com/apify/crawlee/actions/runs/13712422089/job/38361109957#step:12:38)

For now we are pinning the playwright version in our templates.

daijro · 2025-03-07T17:22:31Z

daijro
Mar 7, 2025
Maintainer

Hello, Thanks for the JS port! Looks like Playwright updated their Firefox patches last week. I'll merge the new changes into Camoufox this weekend.

4 replies

daijro Mar 15, 2025
Maintainer

Update: I've pushed the latest changes last weekend, however, I'm a bit confused where the Playwright team implemented Browser.setContrast in the latest push.

I can see the change that calls the method in the Playwright server:
https://github.com/microsoft/playwright/blob/ba0bb01114d8efd2017a8584468eb93cfa292789/packages/playwright-core/src/server/firefox/ffBrowser.ts#L246
And in the server-side protocol list: https://github.com/microsoft/playwright/blob/ba0bb01114d8efd2017a8584468eb93cfa292789/packages/playwright-core/src/server/firefox/protocol.d.ts#L304

However, it seems to be missing in Juggler's protocol list, and everywhere else in their repository.
https://github.com/microsoft/playwright/blob/ba0bb01114d8efd2017a8584468eb93cfa292789/browser_patches/firefox/juggler/protocol/Protocol.js#L218

I think I'll just make it a dummy method for now.

daijro Mar 16, 2025
Maintainer

The latest beta should support Playwright 1.51.0 👍

B4nan Mar 16, 2025
Author

Thanks! Will give that a try tomorrow.

B4nan Mar 18, 2025
Author

I can confirm it works again with the latest playwright, thanks!

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Playwright 1.51 (JS) breaks with "method 'Browser.setContrast' is not supported" #230

{{title}}

Replies: 1 comment 4 replies

{{title}}

{{editor}}'s edit

{{editor}}'s edit

{{title}}

{{editor}}'s edit

{{editor}}'s edit

{{title}}

{{title}}

{{title}}

Select a reply

Playwright 1.51 (JS) breaks with "method 'Browser.setContrast' is not supported" #230

B4nan Mar 7, 2025

Replies: 1 comment · 4 replies

daijro Mar 7, 2025 Maintainer

daijro Mar 15, 2025 Maintainer

daijro Mar 16, 2025 Maintainer

B4nan Mar 16, 2025 Author

B4nan Mar 18, 2025 Author

B4nan
Mar 7, 2025

Replies: 1 comment 4 replies

daijro
Mar 7, 2025
Maintainer

daijro Mar 15, 2025
Maintainer

daijro Mar 16, 2025
Maintainer

B4nan Mar 16, 2025
Author

B4nan Mar 18, 2025
Author