[FEATURE] Claude in Chrome: pin the MCP tab group to a designated Chrome window

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I keep many Chrome windows open, each scoped to a different workstream. When a
Claude in Chrome session starts from the desktop app, the extension puts its tab
group in whichever window was focused last. So over a day the Claude tab groups
end up spread across every window. There's no setting to control this, and the
only workaround is remembering to click into the intended window before starting
a session.

Filing this narrowly because the adjacent issues each cover something else.
#27644 and #66741 are about how many windows the extension opens, so reusing an
existing or last-focused window still leaves placement arbitrary once several are
open. #19740 proposes /window <window_id> bundled with multi-profile support and
was closed as a duplicate. #26591 asks to drop the tab group requirement entirely
and was closed as not planned.

Proposed Solution

A setting that designates one Chrome window as the target for all MCP tab groups.
Something like a "Use this window for Claude sessions" option in the extension
menu, with new sessions always creating their group there. If the designated
window has been closed, fall back to current behavior.

Alternative Solutions

Dragging each group into the intended window after the fact, or right-click >
Move group to another window. Both work but are manual cleanup every session.

#66741 asks for the extension to reuse the last-focused window. Last-focused is
still nondeterministic with several windows open, so it wouldn't cover this.
#27644 asked for something in this area and was closed as a duplicate with no
target given.

Priority

Medium - Would be very helpful

Feature Category

Other

Use Case Example

Separate Chrome windows scoped to separate workstreams. Starting a session from
the desktop app should put its tabs in the designated Claude window regardless of
which window happened to be focused.

Additional Context

• Surface: Claude desktop app + Claude in Chrome extension
• OS: macOS
• Browser: Chrome, single connected browser
• Related: #27644, #19740, #26591 (all closed), #66741 (open, Windows, covers

window count)