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browser-control-mcp

An MCP server paired with a browser extension that enables LLM clients to control the user's browser (Firefox).

#MCP server# browser extension# LLM clients
Publisherbrowser-control-mcp
Submitted date4/13/2025

๐Ÿš€ Mastering Browser Control with MCP: A Developer's Deep Dive ๐ŸŒ

This document provides an expert-level guide to leveraging the Model Context Protocol (MCP) for advanced browser control, enabling seamless integration between Large Language Models (LLMs) and your Firefox browser. We'll explore the features, use cases, installation, and configuration necessary to unlock the full potential of this powerful tool.

Core Capabilities: A Symphony of Browser Automation ๐ŸŽถ

This MCP server, coupled with a dedicated Firefox extension, empowers LLM clients like Claude Desktop to orchestrate your browsing experience. Here's a breakdown of its key functionalities:

  • Tab Management: Open, close, and reorder tabs with precision.
  • History Mastery: Access and search your browsing history with ease.
  • Content Extraction: Extract text and links from webpages for LLM consumption.
  • Dynamic Highlighting: Locate and highlight specific text within browser tabs.
  • Resourceful Tab Context: Expose the content of each open tab as an MCP resource, allowing LLMs to directly access and process information from specific webpages.

Real-World Applications: Unleashing the Power of AI-Driven Browsing ๐Ÿ’ก

Let's delve into practical scenarios where this integration shines:

Intelligent Tab Management ๐Ÿง 

  • Context-Aware Cleanup: "Close all tabs unrelated to my current research on quantum physics."
  • Semantic Reorganization: "Rearrange my tabs based on topic similarity, grouping related pages together."
  • Automated Archiving: "Close all tabs that haven't been accessed in the last week and save their URLs to a markdown file."

Enhanced Browser History Analysis ๐Ÿ•ต๏ธโ€โ™€๏ธ

  • Precise Information Retrieval: "Find the article I read last month about the impact of AI on the healthcare industry."
  • Automated Research Synthesis: "Open the top 5 articles about blockchain technology I visited in the past two weeks, avoiding duplicates, and summarize their key arguments."

AI-Powered Research and Exploration ๐Ÿ”ญ

  • Dynamic Content Interaction: "Open Hacker News, navigate to the top story, read the article and the first 20 comments. Analyze the sentiment of the comments and compare it to the article's main point."
  • Scholarly Literature Review: "Use Google Scholar to find the 5 most recent and highly cited papers on transformer networks. Open each paper, extract the abstract, introduction, and conclusion, and generate a concise summary of the current state-of-the-art."
  • Automated Data Aggregation: "Search Google for local Italian restaurants. Open the top 5 results. Extract their names, addresses, phone numbers, and customer reviews. Present the information in a structured table."

Installation: Building Your AI-Powered Browser ๐Ÿ› ๏ธ

Follow these steps to set up the MCP server and Firefox extension:

  1. Clone the Repository:

    git clone <repository_url> cd <repository_directory>
  2. Install Dependencies:

    npm install npm install --prefix mcp-server npm install --prefix firefox-extension
  3. Build the Project:

    npm run build

    This command generates a shared secret for secure communication between the server and extension.

Configuration: Integrating with Claude Desktop โš™๏ธ

To connect the MCP server with Claude Desktop, modify the claude_desktop_config.json file:

{ "mcpServers": { "browser-control": { "command": "node", "args": [ "<path to repo>/mcp-server/dist/server.js" ] } } }

Important: Replace <path to repo> with the actual path to your repository. Restart Claude Desktop to apply the changes.

Firefox Extension Setup: Bridging the Gap ๐ŸฆŠ

  1. Access Firefox Debugging: Type about:debugging in the Firefox address bar.
  2. Navigate to "This Firefox."
  3. Load Temporary Add-on: Click "Load Temporary Add-on..." and select the manifest.json file located in the firefox-extension directory.

Pro Tip: For development and testing, consider using a separate Firefox instance like Firefox Developer Edition to avoid potential conflicts with your primary browser profile.

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