Incognito Tab Creation Fails With Not Allowed (-32000) Error

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Introduction

When attempting to create incognito (isolated) browser contexts (tabs) using target.CreateBrowserContext() in chromedp, you may encounter the error "Not allowed (-32000)". This issue can occur whether you're using a remote allocator with chromedp/headless-shell or your local exec allocator. In this article, we'll delve into the steps to reproduce this error and explore potential solutions to resolve it.

Steps to Reproduce

To reproduce this issue, follow these steps:

Step 1: Create a Global Chromedp Context

First, create a global chromedp context using the following code:

opts := append(chromedp.DefaultExecAllocatorOptions[:],
	chromedp.Flag("headless", true),
	//chromedp.Flag("remote-debugging-port", 9222),
	chromedp.Flag("disable-gpu", true),
	chromedp.Flag("no-sandbox", true),
	chromedp.Flag("disable-web-security", true),
)
allocCtx, cancelAlloc := chromedp.NewExecAllocator(context.Background(), opts...)
ctx, cancelCtx := chromedp.NewContext(allocCtx, chromedp.WithLogf(log.Printf))

This code sets up a global chromedp context with the specified flags.

Step 2: Attempt to Create a New Incognito Browser Context

Next, attempt to create a new incognito browser context using the following code:

var tabCtx context.Context
var cleanup func()
var browserContextID cdp.BrowserContextID

err := chromedp.Run(ctx, chromedp.ActionFunc(func(ctx context.Context) error {
	var err error
	browserContextID, err = target.CreateBrowserContext().Do(ctx)
	if err != nil {
		return fmt.Errorf("create browser context: %w", err)
	}

	newTargetID, err := target.CreateTarget("about:blank").
		WithBrowserContextID(browserContextID).
		Do(ctx)
	if err != nil {
		return fmt.Errorf("create target: %w", err)
	}

	var cancel context.CancelFunc
	tabCtx, cancel = chromedp.NewContext(ctx, chromedp.WithTargetID(newTargetID))

	cleanup = func() {
		cancel()
		if err := target.DisposeBrowserContext(browserContextID).Do(ctx); err != nil {
			log.Printf("Error disposing browser context: %v", err)
		}
	}
	return nil
}))

This code attempts to create a new incognito browser context and a new target with the specified browser context ID.

The Error

The process fails with the error "create browser context: Not allowed (-32000)".

Expected Result

A new incognito browser context should be created successfully, allowing the subsequent creation of an isolated tab with its own cookie store.

Actual Result

The creation of the browser context fails with the error "Not allowed (-32000)".

Environment

  • chromedp version: [v0.13.1]
  • Chrome/Chromium version: [136.0.7052.2]
  • OS: [Mac OS ]

Potential Solutions

If you've tried all the solutions from similar GitHub issues and still encounter this error, here are some potential solutions to consider:

1. Update Chromedp Version

Ensure that you're using the latest version of chromedp. You can update to the latest version using the following command:

go get -u github.com/chromedp/chromedp

2. Update Chrome/Chromium Version

Ensure that you're using the latest version of Chrome/Chromium. You can update to the latest version using the following command:

brew update && brew upgrade google-chrome

3. Disable Remote Debugging

Disable remote debugging by removing the chromedp.Flag("remote-debugging-port", 9222) flag from your chromedp context.

4. Use a Different Allocator

Try using a different allocator, such as the chromedp.NewRemoteAllocator function, to see if the issue persists.

5. Check for Conflicting Flags

Check for any conflicting flags in your chromedp context. For example, if you're using both chromedp.Flag("headless", true) and chromedp.Flag("no-sandbox", true), try removing one of them to see if the issue persists.

Conclusion

In conclusion, the "Not allowed (-32000)" error when creating an incognito browser context in chromedp can be frustrating to resolve. However, by following the steps outlined in this article and considering the potential solutions, you should be able to resolve the issue and successfully create an incognito browser context.

Additional Resources

If you're still experiencing issues, you can try the following additional resources:

Introduction

In our previous article, we explored the issue of incognito tab creation failing with the "Not allowed (-32000)" error in chromedp. In this Q&A article, we'll address some of the most frequently asked questions related to this issue.

Q: What is the "Not allowed (-32000)" error?

A: The "Not allowed (-32000)" error is a common issue that occurs when attempting to create an incognito browser context in chromedp. This error is typically caused by a conflict between the flags used in the chromedp context.

Q: What are the common causes of the "Not allowed (-32000)" error?

A: The common causes of the "Not allowed (-32000)" error include:

  • Conflicting flags in the chromedp context
  • Using an outdated version of chromedp
  • Using an outdated version of Chrome/Chromium
  • Disabling remote debugging
  • Using a different allocator

Q: How can I resolve the "Not allowed (-32000)" error?

A: To resolve the "Not allowed (-32000)" error, you can try the following:

  • Update chromedp to the latest version
  • Update Chrome/Chromium to the latest version
  • Disable remote debugging
  • Use a different allocator
  • Check for conflicting flags in the chromedp context

Q: What are the potential solutions to the "Not allowed (-32000)" error?

A: The potential solutions to the "Not allowed (-32000)" error include:

  • Using the chromedp.NewRemoteAllocator function
  • Removing conflicting flags from the chromedp context
  • Disabling remote debugging
  • Using a different allocator

Q: Can I use the chromedp.NewRemoteAllocator function to resolve the "Not allowed (-32000)" error?

A: Yes, you can use the chromedp.NewRemoteAllocator function to resolve the "Not allowed (-32000)" error. This function allows you to create a remote allocator that can be used to create a new browser context.

Q: How can I check for conflicting flags in the chromedp context?

A: To check for conflicting flags in the chromedp context, you can use the following code:

opts := append(chromedp.DefaultExecAllocatorOptions[:],
	chromedp.Flag("headless", true),
	//chromedp.Flag("remote-debugging-port", 9222),
	chromedp.Flag("disable-gpu", true),
	chromedp.Flag("no-sandbox", true),
	chromedp.Flag("disable-web-security", true),
)

In this code, we're checking for conflicting flags by commenting out the chromedp.Flag("remote-debugging-port", 9222) flag.

Q: Can I use a different allocator to resolve the "Not allowed (-32000)" error?

A: Yes, you can use a different allocator to resolve the "Not allowed (-32000)" error. For example, you can use the chromedp.NewRemoteAllocator function to create a remote allocator that can be used to create a new browser context.

Conclusion

In conclusion, the "Not allowed (-32000)" error when creating an incognito browser context in chromedp can be frustrating to resolve. However, by following the steps outlined in this article and considering the potential solutions, you should be able to resolve the issue and successfully create an incognito browser context.

Additional Resources

If you're still experiencing issues, you can try the following additional resources: