Title:** `drive.mount()` fails with "credential propagation was unsuccessful" on Chrome 145

[jcatanza]

Title: drive.mount() fails with "credential propagation was unsuccessful" on Chrome 145

Body:

Environment:

• OS: Windows 11 Version 25H2 (Build 26200.7922)
• Chrome: Version 145.0.7632.160 (Official Build) (64-bit)
• Colab URL: colab.research.google.com

Problem:
drive.mount('/content/drive') fails with MessageError: Error: credential propagation was unsuccessful every time. The internal Colab permission popup ("Permit this notebook to access your Google Drive files?") appears and I click Allow, but the OAuth authorization window never appears and the mount fails.

What I tried:

• Allowed third-party cookies for colab.research.google.com in Chrome settings
• Allowed popups for colab.research.google.com in Chrome settings
• Tried incognito mode
• Verified Google Colab is listed in Google Drive connected apps
• Confirmed no restrictive Chrome policies are in effect

Expected behavior:
Google OAuth authorization window should appear after granting the internal Colab permission, allowing Drive to mount successfully.

Additional context:
Issue started on Chrome 145. Google Colab does not appear in myaccount.google.com/permissions, suggesting the OAuth flow never completes.

[metrizable]

@jcatanza Thanks for filing the issue and thanks for using Colab.

Are you able to reproduce this with all add-ons disabled in incognito mode?