Jev in production › Agent tool and action selection

fastbrowse

Browser agent that indexes each page into candidate controls and has Jev pick the next action, while an LLM plans and reads and code gates secrets and irreversible clicks. It passed 41/42 tasks against 39/42 for the Browser Use agent (author).

Open on GitHub ↗

41/42measured against a baseline, as published by the source
Use
Agent tool and action selection
Industry
Developer tools
Form
Open-source tool
Stage
Beta
Plugs into
Chrome
Listed
2026-09-21
Found via
github
Repository
agent-labs-dev/fastbrowse
Stars
114
Forks
14
Last push
2026-10-10
Language
Python
License
MIT
fastbrowse screenshot
docs/assets/demo.gif in the agent-labs-dev/fastbrowse README, MIT; shown from GitHub.

The README opens with

Run browser tasks locally or in a cloud browser. Jev chooses from indexed page controls; fastbrowse returns cited answers or schema-validated data. Code controls credentials, authorization and spending.

fastbrowse indexes the page into candidates and has Jev, a choice model, pick one, so it cannot click something that was never on the page. Factual claims in a complete answer cite verbatim quotes from the page.

Recorded on local Chrome: 13 steps, 20.9s and $0.0034 in model calls. Playback is 1.4x faster with pauses cut.

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For the project's own README, linking back here:

Listed in Jev in production

Also used for agent tool and action selection