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🪶Nanobrowser

ACTIVE BREAKOUT

nanobrowser/nanobrowser · homepage ↗

Open-Source Chrome extension for AI-powered web automation. Run multi-agent workflows using your own LLM API key. Alternative to OpenAI Operator.

⭐ Very popular: 14k stars, gaining about 21 a week

View on GitHub ↗

repo profile

vintage 2024 2 years old
language TypeScript
license Apache-2.0

momentum

total stars 14k
stars added last week +21
binary downloads 3k total · GitHub releases
commits / week 0 steady
issues closed 57% closed same-day, median
contributors 27
release cadence monthly
last activity 8mo ago

durability

backing community / independent community
openness permissive

since we covered it

monthly average + 580/mo (+16%/mo) · + 10k total since PR#4

why it's a big deal

  • Positions itself as a free alternative to OpenAI Operator; users bring their own API keys and pay only per-use provider costs with no subscription.
  • Runs entirely in the local browser, so credentials and browsing stay client-side and are never sent to a cloud service beyond the LLM provider the user picks.
  • Helps anyone wanting to automate multi-step web tasks (clicking, typing, scrolling, form flows) without committing to a hosted agent product.

under the hood

  • Chrome extension written mostly in TypeScript, built on the React and Vite Chrome extension boilerplate with LangChain and Puppeteer.
  • Uses a multi-agent split where a Planner handles reasoning and course correction and a Navigator executes the page interactions.
  • Supports OpenAI, Anthropic, Google Gemini, Ollama, Groq, Cerebras, Llama, and custom OpenAI-compatible endpoints, and is licensed Apache 2.0 with roughly 13k stars.

Radar summary, generated from the project's public sources

star history

PR#4 · 4k14k now Dec 2024Aug 2026
  1. PR#4 4k 2025-03-19
  2. now 14k + 10k since first covered

curve is sampled from GitHub's star history, plus our own daily readings since we covered it; the dashed stretch is before we first covered it, the solid line since. figures at coverage are the numbers we printed then (approx.), current count is live.

understory

Better known than its recent output, coasting a little on attention.

-55 understory score output 0 · clout 55
Aug 2025 Jul 2026
  • output, commits & releases
  • clout, star velocity

output = commits & releases; clout = star velocity, both 0 to 100 monthly indices; the gap where output runs above clout is the understory. The understory →

covered in

  • PR#4 2025-03-19 below the radar

    Run multi-agent workflows with your LLM API key in a Chrome extension

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