Feature request: support Brave browser for /chrome integration

Summary

Extend the Claude Code /chrome integration (Claude in Chrome) to also work with Brave. Brave is Chromium-based and supports the same extension API surface as Chrome, so the existing companion extension should be loadable, but /chrome currently only detects Chrome.

Motivation

Many developers use Brave as their primary browser for privacy reasons but still want the /chrome browser-control workflow (navigate, fill forms, screenshots, console/network debug) from Claude Code. Today this forces a context switch to Chrome just to use the integration.

Proposed behavior

• /chrome (or a renamed /browser) detects any installed Chromium-based browser that has the Claude companion extension loaded — Chrome, Brave, Edge, Arc, etc.
• The companion extension is published to (or sideloadable into) Brave; Brave already supports installing from the Chrome Web Store, so this may "just work" with a detection/connection fix on the Claude Code side.
• claude --chrome flag could stay for back-compat; a generic --browser flag would be cleaner long-term.

Acceptance

• Installing the extension in Brave + running /chrome → \"Reconnect extension\" successfully detects and connects.
• All existing capabilities (navigate, click, type, screenshot, GIF, console, network) work identically in Brave.

Environment

• OS: Linux (Fedora 43)
• Browser requested: Brave (Chromium-based)
• Claude Code: current

Filed by: Philamentous