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BrowserKitten: AI Web Agent Built into Chrome
A Chrome extension that turns your browser into a programmable web agent: select any element on the live page, describe what you need done, and the agent completes it.
BrowserKitten is a Chrome extension that turns your browser into a programmable web agent. The principle: you select any element on an open page, describe your task, and the agent completes it directly in the live browser where you are already logged in. It supports Chrome 135 and above, with additional capabilities in Chrome 138 and above, and installs as an unpacked extension without any build step or package manager. The extension uses a BYOK model: you enter your own AI model key, and the data is processed through the provider you choose. It is built on Chrome MV3 and includes a service worker, a side panel, and a ToolLoopAgent component for executing multi-step action chains.
Why a vibe-coder should care
With BrowserKitten, the agent can work directly on websites where you are logged in, filling out forms, clicking elements, and gathering data without an API or scraping scripts. Tasks that took thirty minutes of manual browser work become a single instruction to the agent.
How to install
Copy this and send it to your agent — Claude Code, Codex, any of them:
Install the Chrome extension as an unpacked extension from https://github.com/Player-YN/BrowserKitten — follow the README, add my API key, and show me how to select a page element and give the agent a task. Chrome 135 or higher required.
Installs as a Chrome extension — no server or powerful hardware needed. Chrome 135 or higher and an AI model key are all you need.
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