# FoxHound

> Agent Browser Bridge for Firefox. Drives the browser from the FoxHound MCP server over a local authenticated WebSocket so an AI agent can interact with tabs, traffic, cookies, storage, and the page.

Canonical page: [https://chrome-stats.com/d/foxhound-mcp](https://chrome-stats.com/d/foxhound-mcp)

## Overview

- **ID:** `foxhound-mcp`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Amr Elsagaei
- **Category:** web-development,privacy-security
- **Daily users:** 22
- **Weekly downloads:** 2
- **Version:** 1.0.4
- **Last updated:** 2026-05-11
- **First published:** 2026-04-28
- **Size:** 167 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/foxhound-mcp/)
- **Website:** [https://amrelsagaei.com](https://amrelsagaei.com/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/foxhound-mcp/privacy/](https://addons.mozilla.org/firefox/addon/foxhound-mcp/privacy/)

## Description

<strong>FoxHound</strong> is the Firefox half of an Agent Browser Bridge. It pairs with a small MCP server installed from npm so that an AI agent (Claude Code, Claude Desktop, Cursor, Antigravity, or any MCP client) can drive the browser end to end.

Once both halves are running the agent can:
<ul><li>Open URLs, switch tabs, click and fill forms, run JavaScript in a tab, wait for elements or navigations, upload files, and screenshot the page or any single element.</li><li>Capture every HTTP request and response with bodies. Each captured request is tagged with the PwnFox container it came from. Replay any request through the same container.</li><li>Read and write cookies, <strong>localStorage</strong>, <strong>sessionStorage</strong>, <strong>IndexedDB</strong>, and <strong>Cache Storage</strong>. Snapshot every storage layer for a tab origin in one call.</li><li>Inspect what the page already runs without injecting anything new: postMessage listeners and traffic, WebSocket frames, Web Workers, service workers, route changes, errors, dangerous DOM sinks, console output.</li><li>Pause and forward requests on demand for active testing.</li></ul>
<strong>Privacy.</strong> Everything stays on your machine. The extension talks only to a WebSocket server bound to 127.0.0.1, signed with HMAC-SHA256 using a 32 byte secret generated locally on first install. No analytics, no telemetry, no remote code, no third party calls.

Install the companion MCP server with <code>npm install -g foxhound-mcp</code>, then copy the configuration shown in the add on options page into your MCP client.

Full setup guide and issue tracker: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/51cc0addad4669516b0141a740fdb7401a75357eb549c06dfc2e9261f43825c5/https%3A//github.com/amrelsagaei/foxhound" rel="nofollow">github.com/amrelsagaei/foxhound</a>.

## Rankings

- #23,655 — Overall
- #228 — traffic
- #235 — agent

## Permissions and access

### Permissions

- `webRequest`
- `webRequestBlocking`
- `tabs`
- `activeTab`
- `cookies`
- `contextualIdentities`
- `storage`
- `proxy`
- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [FoxMCP](https://chrome-stats.com/d/foxmcp) — 35 users, 5.00 / 5
- [FoxPilot](https://chrome-stats.com/d/foxpilot) — 14 users, 4.00 / 5
- [Foxhole for Claude](https://chrome-stats.com/d/foxhole-for-claude) — 47 users
- [Open Browser Control](https://chrome-stats.com/d/open-browser-control) — 28 users, 5.00 / 5
- [Fox Pilot](https://chrome-stats.com/d/fox-pilot) — 2 users
- [Blueprint MCP for Firefox](https://chrome-stats.com/d/blueprint-mcp-for-firefox) — 83 users, 5.00 / 5
- [FireFoxHound](https://chrome-stats.com/d/firefoxhound) — 5.00 / 5
- [xgoose](https://chrome-stats.com/d/xgoose)
- [PwnFox](https://chrome-stats.com/d/pwnfox) — 3,696 users, 5.00 / 5
- [Browser for AI Agent](https://chrome-stats.com/d/browser-for-ai-agent) — 15 users, 5.00 / 5
- [AgentFox](https://chrome-stats.com/d/agentfox) — 1 users
- [fastfox](https://chrome-stats.com/d/fastfox) — 1 users, 4.00 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/foxhound-mcp)