[BUG] Claude Chrome Extension - Cannot access certain sites
Preflight Checklist
- [x] I have searched existing issues and this hasn't been reported yet
- [x] This is a single bug report (please file separate reports for different bugs)
- [x] I am using the latest version of Claude Code
What's Wrong?
Description
The Claude in Chrome extension refuses to navigate to a specific internal staging
domain ("internal-staging-domain.example.com"), returning the error:
"Navigation to this domain is not allowed"
A sibling staging domain on the same parent domain (different subdomain) navigates
and interacts fine (login, clicks, screenshots all work).
Troubleshooting done
- Chrome extension "Site access" setting: "On all sites" (unrestricted)
- Extension's own Options > Permissions > "Your approved sites": empty, no
"add site" control available, and visiting the domain directly in a normal
tab does not trigger any Claude approval/consent prompt
- chrome://policy: no Chrome policies, no Extension Install Policies, and no
policies under the "Claude" section — "No policies set" everywhere
- Retried navigation multiple times / recreated the tab — error is consistent,
not transient
Expected behavior
Either the navigation succeeds (matching the sibling subdomain), or the tool
surfaces which specific rule/allowlist is blocking the domain so the user can
address it.
Environment
- Claude in Chrome extension
- Chrome version: 152.0.7933.0
What Should Happen?
Claude in Chrome should not block domains if there's no restriction placed by environment
Error Messages/Logs
Steps to Reproduce
Install Claude in Chrome extension
visit - https://domain1.venuslabs.co.in - works fine
visit - https://domain2.venuslabs.co.in - breaks down
there's no blocking by chrome browser or extension.
Claude Model
Sonnet (default)
Is this a regression?
I don't know
Last Working Version
_No response_
Claude Code Version
Claude Code version: 2.1.205
Platform
Anthropic API
Operating System
Windows
Terminal/Shell
Terminal.app (macOS)
Additional Information
<img width="1920" height="1080" alt="Image" src="https://github.com/user-attachments/assets/0c261416-a426-42ea-8fa3-365c5f49b3e5" />
<img width="1920" height="1080" alt="Image" src="https://github.com/user-attachments/assets/009efe7d-241b-4b3d-aef3-fe8aa7cc2a96" />
<img width="1920" height="1080" alt="Image" src="https://github.com/user-attachments/assets/b857024c-5451-4bcb-8895-724d4b9fed83" />