Browser39: A Headless Web Browser for AI Agents
Browser39 is a headless web browser built specifically for AI agents. It runs locally as a single binary with no dependencies, external browser requirements, or fees.
Core Features
- Converts web pages to token-optimized Markdown locally
- Executes JavaScript
- Manages cookies and sessions
- Queries the DOM
- Fills forms
- Content preselection
- Encrypted session persistence
- Auth profiles that keep credentials out of the LLM context
- DOM queries via CSS selectors and JS expressions
Integration Options
Browser39 offers multiple integration methods:
- MCP (stdio + HTTP) for Claude Desktop, Claude Code, and any MCP client
- JSONL file-based IPC for any language (Python, Node, Rust, shell)
- CLI for one-shot fetch
- OpenClaw Plugin
Installation
For OpenClaw users:
openclaw plugins install https://github.com/alejandroqh/browser39.gitThe tool is available on GitHub at https://github.com/alejandroqh/browser39.
📖 Read the full source: r/openclaw
👀 See Also
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Atuin v18.13 adds AI shell commands, faster search daemon, and PTY proxy
Atuin v18.13 introduces three major features: an AI-powered English-to-Bash helper called atuin ai, a faster search daemon with in-memory indexing, and a PTY proxy called hex that enables popup rendering without clearing terminal output.
Inline Visualizer: Local AI Models Can Now Render Interactive HTML Visualizations
Inline Visualizer is a BSD-3 licensed plugin for Open WebUI that enables any local AI model with tool calling support to render interactive HTML/SVG visualizations directly in chat, with a JavaScript bridge allowing elements to send messages back to the AI.
Cognitive Science Technique Boosts LLM Creativity: /reframe Slash Command for Claude Code
A Reddit user developed a /reframe slash command for Claude Code that implements a cognitive science technique called distance-engagement oscillation, which improved creative problem-solving by 40% in tests across three open-weight LLMs.