# Hanzo Extension — your browser, as a tool an agent can use > A Chrome, Firefox and Safari extension that lets a Hanzo agent drive the browser you are already signed into: open tabs, read pages, fill forms, and read the console and network traffic back. It joins the local Hanzo fabric through a native messaging host, so there is no port to open. # Hanzo Extension Your browser, as a tool an agent can use. It opens tabs, reads pages, and clicks things — in the session you are already signed into. [Add to Chrome](#browsers)[Get Firefox Add-on](#browsers) Extension Preview Chrome · Firefox · Safari ## How it works The extension registers as a provider on the local fabric. Whatever can reach the fabric can then reach a tab. ### It uses your session The agent drives the browser you are already signed into, so a page behind a login is a page it can read. Nothing has to be scraped from the outside. ### No port to open The extension talks to the local Hanzo daemon through a native messaging host over a Unix socket. There is no WebSocket, no localhost port, and nothing else on the machine can dial in. ### Connected means registered It only reports itself connected once the daemon lists it as a provider. An open pipe to a wedged process is the failure this replaced, and it is checked on every tick. ### Three browsers, one behaviour Chrome, Firefox and Safari builds come out of the same source. The evaluate rule is shared, so the same snippet from a caller behaves identically in all three. ### Tabs are addressable Each browser registers separately, so listing tabs asks the browser that is active — and naming a tab id from another browser's list is how you reach the other one. ### The rest of your tools, too The same repo carries connectors for the software your work already lives in — documents, tickets, design files, mail, calendars — so an agent reaches them the same way it reaches a tab. ### Read a page as text It hands back page content, console messages and network requests, which is what makes it useful for checking your own site rather than just browsing someone else's. ### Installs from a file Load it unpacked in Chrome or as a temporary add-on in Firefox while you are working on it. The build produces all three targets in one command. ## Available on All Major Browsers Install the Hanzo Extension on your preferred browser ### Chrome Perfect integration with Google Chrome browser with all features supported. Add to Chrome ### Firefox Fully compatible with Mozilla Firefox for privacy-conscious users. Get Firefox Add-on ### Edge Enhanced experience on Microsoft Edge with optimized performance. Add to Edge ### More Browsers Safari, Opera, and other Chromium-based browsers are also supported. View All Browsers ## What you would use it for Mostly the work that only exists inside a browser window ### Check the change you just made An agent that edited a page can open it, look at what rendered, and read the console — instead of telling you it thinks the fix worked. ### Behind a login An internal dashboard, a vendor console, an admin panel. It runs in the session you already have, so there is no service account to provision for a one-off task. ### Debug the request, not the guess Network requests and console messages come back as data. When a page misbehaves, the agent can read what the browser saw. ### The long boring form Multi-step flows that exist only in a UI and have no API behind them. It fills them in and tells you where it got stuck. ## Install it and open a tab Once it is registered, your coding agent can check the page it just changed instead of asking you to. [Install Extension](#browsers) ## Get started with Extension [Read the docs](https://docs.hanzo.ai/docs/projects/hanzoai/extension)[View on GitHub](https://github.com/hanzoai/extension) ## Open source License: Apache-2.0[hanzoai/extension](https://github.com/hanzoai/extension) ## Get Extension Browser extension + MCP bridge [Deploy to Cloud](https://console.hanzo.ai/deploy)[Self-host](https://docs.hanzo.ai/docs/projects/hanzoai/extension)