Browser MCP Bridge

Name: Browser MCP Bridge
Author: HarshXor

Companion extension for the Browser MCP server: lets an MCP client control every tab (DOM, selectors, network, typing & clicking).Companion extension for the open-source Browser MCP server. It exposes the current Firefox session over a local WebSocke

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-09-26

Version:

0.2.6

Last updated: 2026-08-04

Features & Capabilities

Browser MCP Bridge connects your Firefox to a locally-running Model Context Protocol (MCP) server, letting an MCP-compatible client automate the browser you already have open.

What it can do: • Tabs — list every tab (stable id, title, url) across all windows; open, switch, and close tabs. • Read pages — accessibility snapshots, CSS-selector queries, text/HTML/attributes, page screenshots, and console logs. • Network — capture per-tab HTTP requests including method, URL, status, content-type, and request/response bodies (great for inspecting JSON APIs). • Interact — click, type, hover, select options, press keys, scroll, and navigate.

How it works: the extension is only a bridge. It connects as a WebSocket client to a server you run yourself on localhost (default ws://127.0.0.1:9010). No data is sent to any third-party or to the developer. If the local server isn't running, the extension does nothing.

Requires the companion server (open source): • PyPI: firefox-browser-mcp — run with uvx firefox-browser-mcp • Source & docs: https://github.com/ICWR-TEAM/Firefox-Browser-MCP

Open the toolbar popup to see connection status and configure the bridge URL.

User Growth & Download Statistics

Add-on

By:

HarshXor

Daily users:

Version:

0.2.6 Last updated: 2026-08-04

Version code:

6387519

Creation date:

2026-07-30

Firefox add-on GUID:

firefox-browser-mcp@incrustwerush.org

Firefox add-on numeric ID:

3046193

Weekly download count:

Firefox on Android:

Risk:

Permissions:

Content scripts matches:

<all_urls>

Size:

19.42KB

Email:

af*****@gmail.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-09-26

Compare stats and ranking:

Ranking

# 38,038 ▲

For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

HarshXor

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/browser-mcp-bridge/

Email:

af*****@gmail.com

Website:

https://incrustwerush.org

Is Browser MCP Bridge Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Browser MCP Bridge requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Browser MCP Bridge is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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