Tethernet by DrBenedictPorkins

Claude browser co-pilot for Firefox. Guides you step by step through complex web workflows — App Store Connect, AWS, Stripe, DNS — in your real logged-in session. Requires the free Tethernet MCP server (see description).

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About this extension

Tethernet connects your Firefox browser to Claude Code or Claude Desktop via MCP (Model Context Protocol). Claude sees your screen, reads the current page state, and guides you through complex multi-step web workflows — while you stay in control of your real, logged-in browser.

Unlike Playwright or Puppeteer which spawn isolated browsers, Tethernet uses your existing Firefox session — you're already logged in, your extensions are active, and 2FA/CAPTCHA steps are handled by you naturally.

Use cases:
• App Store Connect — app registration, provisioning profiles, TestFlight
• AWS Console — IAM roles, VPC, S3, security groups
• Stripe — webhooks, products, customer portal
• DNS management — any registrar
• Government and compliance forms
• Any multi-step authenticated workflow

── MCP SERVER REQUIRED ──
This extension requires the free Tethernet MCP server running locally alongside Claude Code or Claude Desktop.

Install with one command:
claude mcp add tethernet --scope user -- npx -y @drbenedictporkins/tethernet-mcp

Full setup instructions: https://github.com/DrBenedictPorkins/firefox-tethernet

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Permissions and data

Required permissions:

Read and modify bookmarks
Get data from the clipboard
Input data to the clipboard
Extend developer tools to access your data in open tabs
Download files and read and modify the browser’s download history
Access browsing history
Display notifications to you
Access recently closed tabs
Access browser tabs
Access browser activity during navigation
Access your data for all websites

Required data collection, according to the developer:

Browsing activity
Website content