Nanobrowser

Nanobrowser is a browser AI agent for people who want to delegate repetitive web tasks and research. It carries out actions inside the browser while letting you choose the models that handle the work.

• Web tasks: Collect news headlines, research GitHub repositories or find products that match specific criteria across websites.
• Adaptive planning: Separate planning and browsing agents work together, and the planner can adjust its approach when it encounters an obstacle.
• Model choice: Use Ollama or a custom OpenAI-compatible backend for local inference, or connect to OpenAI, Anthropic, Gemini and other cloud providers with your own API keys; each agent can use a different model.
• Task conversations: A chat side panel shows progress, lets you ask follow-up questions about completed tasks and gives you access to conversation history.

Browser actions run locally. With a local backend, model processing stays on your machine; cloud model requests go to the selected provider. Recommended local models include Qwen3-30B-A3B-Instruct-2507, Falcon3 10B, Qwen 2.5 Coder 14B and Mistral Small 24B. Local models need more explicit prompts and context for complex tasks.

The extension is free and open source under Apache 2.0. Chrome and Edge have official support. Firefox, Safari and other Chromium variants, including Opera and Arc, aren't officially supported.