A chat sidebar
A model in a panel that reads the page and answers questions about it. Useful, and roughly where every browser vendor started. It summarises, it does not act, and you are still the one clicking.
AI browser
A
free
agentic
browser
that
is
not
a
new
browser
Every AI browser so far has asked you to move in: a new Chromium, a new profile, a new set of logins, a new company to trust with all of it. Browsentic is an extension instead. It adds the agent to the Chrome, Firefox, Edge, Brave or Arc you already have, it runs on your own machine, and it is MIT licensed.
Definitions
Four things people mean by “AI browser”
The phrase covers four quite different products, and picking the wrong one wastes an afternoon. Only one of these is what Browsentic does.
Agentic browsing
The panel acts. It clicks, types, navigates, waits out the slow parts and stops at anything that commits. This is the part that gives back an afternoon, and it is what Browsentic does.
A whole AI browser
Comet, Dia, Neon and, until August 2026, ChatGPT Atlas. The agent is fused into a browser you have to adopt, along with its search, its profile and whatever its company decides next year.
Headless automation
Playwright, Browser Use, a script on a CI runner. A browser nobody is looking at, driving accounts nobody is signed in to. A genuinely different job, and the wrong tool for your own logged-in work.
Free
Free, and here is exactly what that covers
Free is a word with a lot of footnotes attached to it in this category, so these are ours, all four of them.
No subscription
MIT licensed and open source. There is no paid tier, nothing held back behind one, and no plan to introduce one. The source is on GitHub and it is yours whatever happens to the project.
No API key
It never calls a model itself. It spawns the agent CLI you already signed in to, so the tokens come out of a plan you already pay for and there is no key to paste anywhere.
No account
Nothing to sign up for, and no telemetry account behind it. A fresh install is connected to nothing at all until you pair it yourself with a code that lives ten minutes.
No company in the middle
A local daemon on loopback, your agent, your browser. There is no relay, no hosted runner and no browser in someone else’s data centre. The only thing that leaves your machine is what your own agent sends its own provider.
npx browsentic setup
Pick yours
The browser you already use is the one it turns into this
There is nothing to import, no profile to migrate and no extensions to reinstall, because you never left. Each of these pages covers the agents, the install and what that browser does differently.
Chrome
Browsentic is a Chrome extension with an AI side panel, and it brings no model of its own. It hands the tab in front of you to the agent CLI already sitting on your machine, inside the session you are already signed in to.
Firefox
Anthropic, Google and OpenAI all put their browser agents in Chrome and stop there. Browsentic is a Firefox add-on, signed by Mozilla, with a side panel that runs on whichever of those agents is already on your machine.
Edge
Edge comes with Copilot, one assistant, one account, one model. Browsentic adds a second door: an AI side panel run by the agent CLI you already have, from a daemon on your own machine.
Questions
What people ask before they download one
Is there a free AI browser?
There are free tiers of AI browsers, and then there is this: a free, MIT licensed extension that turns the browser you already use into an agentic one. There is no paid tier and no API key. The only thing you pay for is the agent subscription you already have, and if you have none, one of the CLIs it supports has a free tier of its own.
What is an agentic browser?
A browser where an AI agent can act on the page rather than only talk about it: clicking, typing, navigating, filling forms and waiting out the slow parts, while you watch. The distinction that matters is between answering about a page and doing something on it. Browsentic is the second kind, delivered as an extension rather than as a browser.
Do I have to switch browsers to use an AI browser?
Not for this one. Browsentic is an extension, so your profile, your extensions, your logins and your two-factor state never move. It loads into Chrome, Edge, Brave, Arc or any Chromium browser, and into Firefox as an add-on Mozilla signed.
Is there an AI browser for Firefox?
The vendors ship theirs for Chrome. Browsentic ships a Mozilla-signed Firefox add-on with the same side panel, running on Claude Code, Antigravity, Codex, Mistral Vibe or Grok Build from your own machine. Nine of the 41 tools need Chrome’s debugger and are absent there, and the agent is never offered them.
Does an AI browser need an API key?
Most of them want one, or a subscription to the vendor whose browser it is. Browsentic wants neither. It spawns an agent CLI that is already on your machine and already logged in, so the reasoning runs on credentials you already hold and no key is ever typed into a settings field.
Is it safe to let an agent drive my logged-in browser?
It is a fair question, and the answer is structural rather than a promise. The daemon classifies every connection by an Origin the browser sets and a page cannot forge, then still requires a pairing token or an origin-bound session key. Every action lands on a timeline you are watching, and anything that reaches another person stops and names itself before it happens.
Stop describing the page. Hand it over.
Free and MIT licensed. No signup, no key to paste, and a fresh install connects to nothing until you pair it yourself.
npx browsentic setup