Firebase Studio Preview Redirects to Google Cloud Workstations Marketplace (HAR Analysis Included)

Previews
1

Hi everyone,

I’m trying to determine whether anyone else has started experiencing this issue recently with Firebase Studio.

Environment

  • Firebase Studio

  • Angular 20.3.32

  • ng serve

  • Chrome (latest version)

Expected behavior

When I run:

ng serve

Firebase Studio detects the running development server and opens a Preview URL similar to:

https://4200-<workspace>.cluster-<id>.cloudworkstations.dev

This has been working perfectly for a long time.

Current behavior

Since yesterday afternoon, the behavior changed without me modifying my project or workspace configuration.

ng serve starts successfully, the preview URL is generated correctly, but instead of loading my Angular application, I’m immediately redirected to:

https://console.cloud.google.com/marketplace/product/google/workstations.googleapis.com

What I’ve already verified

  • :white_check_mark: Angular starts successfully.

  • :white_check_mark: ng serve completes normally.

  • :white_check_mark: The preview URL is generated.

  • :white_check_mark: The application itself is running.

  • :white_check_mark: Rebuilt the environment using Firebase Studio: Rebuild Environment.

  • :white_check_mark: Signed out of all other Google accounts and tested with only the Firebase Studio account.

  • :cross_mark: The issue persists.

Firebase Support response

I contacted Firebase Support, and they mentioned they’ve already received similar reports involving Preview authentication.

They suggested:

  • Creating a new Chrome profile with only one Google account.

  • Running Firebase Studio: Rebuild Environment.

  • Allowing third-party cookies for cloudworkstations.dev.

Unfortunately, none of those steps resolved the issue in my case.

HAR Analysis

I captured a HAR file while reproducing the problem.

The authentication flow looks like this:

cloudworkstations.dev
        │
        ▼
302 Redirect
        │
        ▼
/_workstation/forwardAuthCookie
        │
        ▼
302 Redirect
        │
        ▼
console.cloud.google.com/workstations/auth
        │
        ▼
Eventually redirects to the Cloud Workstations Marketplace

What I found interesting is:

  • There are no HTTP 401 responses.

  • There are no HTTP 403 responses.

  • There are no HTTP 404 responses.

  • The entire flow consists of HTTP 302 redirects.

It appears the request reaches Cloud Workstations successfully and then fails during the authentication flow, eventually ending on the Marketplace page.

Questions

Has anyone else experienced this recently?

If so:

  • Did it start around the same time?

  • Were you able to resolve it?

  • Did you identify whether it was related to authentication, cookies, Cloud Workstations, quotas, or a backend issue?

  • If you captured a HAR file, did you observe a similar redirect chain through /_workstation/forwardAuthCookie and workstations/auth?

At this point I’m trying to determine whether this is an isolated issue or a broader problem affecting Firebase Studio Preview.

Any information would be greatly appreciated.

2

Same issue, But after enabling workstation api I am able to reach my preview.

Currently, I haven’t got any bill yet from last 3 days.

3

Understood, I’ll give it a try.

4

It doesn’t matter which project you are just only one. And I seen it is Just authorising

5

Done, I tested it and it worked. The preview opens correctly now. Thanks for the tip, now time to monitor for any charges