WebMCP Controller — Hamb_y

WebMCP Controller connects the Firefox you already use (your tabs, logins and bookmarks) to an AI agent running on your own computer, through the Model Context Protocol (MCP).

What the agent can do:
• List, open, switch, move and close tabs and windows
• Read pages (accessibility snapshot, text, HTML, screenshots)
• Click, type, fill forms, scroll, press keys and wait for content
• Search bookmarks and history, list downloads, restore closed tabs

While it works, a glowing AI cursor glides to whatever it's clicking, with a small bubble saying what it's doing. You can turn it off in the popup.

How it works: Firefox add-ons can't open network ports, so the add-on starts a small companion helper app through Firefox native messaging. The helper serves MCP only on 127.0.0.1 (this computer), and every request needs a random secret token that the add-on generates. Nothing is sent to the developer or any third party. Your AI tool talks to the helper, and the helper talks to this add-on.

Setup (about a minute):
1. Install this add-on.
2. Click its toolbar icon. It shows a one-line command for your system that installs the helper app (Windows, macOS, Linux). Paste it into PowerShell or Terminal.
3. Click "Copy MCP config" and paste it into your AI tool.

Safety:
• Local only by default; token-protected
• Closing tabs or windows and deleting bookmarks need explicit confirmation
• No access to saved passwords; cookies are read-only

Source code for the add-on and the helper (MPL 2.0): https://github.com/hamb1y/webmcp-controller