Claude in Chrome (v1.0.85): phantom blank tabs "http://native/", "http://host/", "http://wrapper/", "http://script/" open on every Chrome startup

Summary

After installing the Claude in Chrome extension, every time Chrome is restarted, four blank tabs are created with these URLs:

• http://native/
• http://host/
• http://wrapper/
• http://script/

The pages are blank (the hostnames don't resolve). Disabling the extension and restarting Chrome makes them stop; re-enabling brings them back.

These four strings match the internal component names of the extension's native-messaging bridge (native / host / wrapper / script), which suggests that on service-worker init / reconnect, one of these identifiers is being passed to a tab-creation API that expects a URL, so Chrome expands the bare token to http://<token>/.

Environment

• OS: Windows 11 Pro 24H2 (build 10.0.26200)
• Chrome: 152.0.7977.64 (Official Build) (64-bit)
• Claude in Chrome extension: 1.0.85

Steps to reproduce

1. Install / enable the Claude in Chrome extension.
2. Fully quit Chrome.
3. Relaunch Chrome.

Expected

No tabs are created by the extension on startup.

Actual

Four blank tabs open: http://native/, http://host/, http://wrapper/, http://script/. If Chrome's "On startup" is set to "Continue where you left off", these get persisted into the session and reappear on every subsequent launch.

Workaround

Disable the extension when not in use; set Chrome "On startup" to "Open the New Tab page" so the blank tabs aren't restored.