Can Reflex MCP use my existing Chrome logins?

Reflex drives its own Chrome profile, not the same window as Claude in Chrome. Log in to a site once in that Reflex-controlled window and ask Reflex to save the session; cookies and localStorage stay on your disk and reuse across tasks. They never leave your machine. If you need Claude to act inside tabs you already have open with extension-managed access, Claude in Chrome is the fit; if you need programmatic multi-step flows from an MCP client, Reflex is.

Do I need a Chrome extension for Reflex?

No. Reflex is an MCP server you add to Claude Desktop, Cursor, Claude Code, or VS Code. Your agent calls reflex_open, reflex_act, and related tools over MCP; Reflex launches and controls Chrome locally. There is no browser extension to install. Claude in Chrome requires the extension and works inside Claude's chat surfaces that support it, not as a general MCP tool for every client.

Which should I use for Claude Desktop browser automation?

Claude Desktop does not run Claude in Chrome; it runs local MCP servers. For browser automation in Claude Desktop without an extension, add Reflex MCP to claude_desktop_config.json, sign in once, and ask Claude to research, fill forms, or scrape in plain English. Use Claude in Chrome when you want help in tabs you already have open in regular Claude chat with the extension enabled.

Claude in Chrome alternative

Browser automation for Claude Desktop without a Chrome extension

Claude in Chrome is Anthropic's extension for help inside tabs you already have open. Reflex is a local MCP server for Claude Desktop, Cursor, and other MCP clients: drive Chrome programmatically with 6 tool calls per three measured flows (versus 14 for Playwright MCP), parallel isolated browsers, and zero page content sent to our servers.

What is a Claude in Chrome alternative for Claude Desktop?

Claude Desktop does not run the Claude in Chrome extension; it runs local MCP servers. Reflex is the alternative when you want browser automation inside Claude Desktop without installing a Chrome extension: add Reflex to your MCP config and ask Claude to research sites, fill forms, or compare prices in plain English. Tasks finish ~1.7x faster end to end than Playwright MCP in our agent-driven benchmark because Reflex batches steps and returns deltas instead of full page dumps.

When should I use Claude in Chrome instead of Reflex?

Use Claude in Chrome when you want Claude to see and act in the exact Chrome tabs you already have open, with the logins and cookies in that profile, while you browse in Claude chat with the extension enabled. Use Reflex when you need repeatable multi-step flows from Claude Desktop, Cursor, or VS Code, parallel isolated browsers, saved sessions on disk, or token-efficient snapshots for long agent tasks.

	Claude in Chrome	Reflex MCP
Works in	Claude chat + extension	Claude Desktop, Cursor, MCP clients
Browser control	Your open tabs	Dedicated Chrome per session
Install	Chrome extension	MCP config (no extension)
Parallel browsers	One profile	Many isolated sessions, free
Page privacy	Sent to Claude for the task	Stays on your machine
Pricing	Claude subscription	Credits per tool call

How do I set up browser automation in Claude Desktop?

Paste the Reflex MCP server block into claude_desktop_config.json, restart Claude Desktop, and run reflex_auth once to save your API key locally. Then ask Claude to open a URL and complete a task; a simple read is one credit, a typical multi-step flow is 2-3 credits. The Claude Desktop install guide has the exact JSON and file paths for macOS and Windows.

Common questions

Claude in Chrome is Anthropic's browser extension that lets Claude read and act inside your existing Chrome tabs, using the logins and cookies you already have in that browser profile. It is built for quick in-tab help while you browse. Reflex MCP is different: a local MCP server that Claude Desktop, Cursor, or other MCP clients call to drive a separate Chrome instance with compressed snapshots and batched automation flows.

Comparing MCP browser tools? See Reflex vs Playwright MCP with measured benchmarks.

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