Claude in Chrome blocks access to aircraft-engineer-sakura.com with "Navigation to this domain is not allowed"

Resolved 💬 3 comments Opened Apr 24, 2026 by chappychatty-netizen Closed May 28, 2026

Bug Description

aircraft-engineer-sakura.com is consistently blocked when using Claude in Chrome (Claude Code desktop), returning "Navigation to this domain is not allowed".

The same domain is also blocked in Claude Cowork.

luana-travel.com (another WordPress site) works fine with the same setup.

Root Cause (investigated)

After examining the extension code in mcpPermissions-BSnCI2j1.js and PermissionManager-ILKpktAR.js, the domain appears to be filtered by Anthropic's URL categorization system (getCategory()), likely due to the word "aircraft" in the domain name causing misclassification.

The turnApprovedDomains check blocks the domain before persisted permissions are even evaluated.

Steps to Reproduce

  1. Open Claude Code desktop with Claude in Chrome extension
  2. Ask Claude to navigate to https://aircraft-engineer-sakura.com/wp-admin/
  3. Error: "Navigation to this domain is not allowed"

Expected Behavior

The domain should be accessible since it is a legitimate WordPress blog about aviation.

Environment

  • Claude Code desktop (Mac)
  • Claude in Chrome extension v1.0.69
  • Domain: aircraft-engineer-sakura.com

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