[BUG] Navigate tool corrupts chrome:// and about: URLs by prepending https://

Description

The navigate tool doesn't recognize special browser URL schemes and incorrectly prepends https:// to them, corrupting the URLs.

Steps to reproduce

1. Use mcp__claude-in-chrome__navigate with url="chrome://extensions"
2. Check actual tab URL via tabs_context_mcp

Expected: Navigate to chrome://extensions
Actual: URL becomes https://chrome//extensions (malformed, note missing colon)

Also affected

• about:blank → "Invalid URL" error
• Likely affects file://, chrome-extension://, etc.

Environment

| Component | Version |
|-----------|---------|
| OS | Arch Linux (kernel 6.18.6-arch1-1) |
| Display | Wayland |
| Chrome Canary | 146.0.7645.0 |
| Claude Code | 2.1.15 |
| Claude Extension | 1.0.40 |
| Node.js | 25.1.0 |

Chrome launch flags

• --ozone-platform=wayland
• --enable-features=UseOzonePlatform

Native messaging

• Host configured at: ~/.config/google-chrome-canary/NativeMessagingHosts/com.anthropic.claude_code_browser_extension.json
• Socket: /tmp/claude-mcp-browser-bridge-rob