Rotunda
Rotunda is an open-source Firefox-based browser for agents operating from a user’s laptop and home network.
What Rotunda is
Rotunda is an open-source Firefox-based browser for agents operating from a user’s laptop and home network. Its CLI can open tabs, describe page elements, click, hover, fill and type in fields, capture screenshots, download files, and extract page content. Rotunda also provides a Playwright browser and context, with existing locators, selectors, and events working natively. The project says it works with OpenClaw and Hermes. Persistent profiles for each agent retain cookies, sessions, downloads, and history under ~/.rotunda. Rotunda describes humanized mouse paths and typing cadence, including missed keys and corrections. It reports the host’s actual GPU, audio drivers, and platform while varying human-dependent attributes such as fonts, extensions, screen size, and locale. Installation uses uv to download a patched Firefox build, requires no hosting layer, and the site says there is no telemetry. It is free under the MPL-2.0 license.
Good
- Open source under MPL-2.0
- Supports Playwright browser and context
- Persistent profiles retain sessions and history
- No telemetry stated
- Runs locally without hosting layer
Watch out
- Fingerprint blocking can still occur
- Positioned for personal agents, not large-scale crawling
- Requires uv installation
Who it suits
Rotunda suits developers building a personal browser agent that acts through a residential network. It fits users who want local storage, Playwright support, and command-line browser controls.
Verdict
Rotunda provides local, scriptable Firefox browsing for personal agents, with Playwright compatibility and persistent profiles. Users should account for possible fingerprint blocking and its stated focus on residential use.
The facts
Each one read from Rotunda's own pages, with the date it was checked.
What it does
- Agent controls
- Its CLI supports browser actions including opening tabs, describing page elements, clicking, filling fields, screenshots, downloads, and page extraction.checked 5 Oct 2026
- Humanized input
- Rotunda says it predicts mouse paths and adds cadence and occasional errors to keystrokes.checked 9 Oct 2026
- Integrations
- The site says Rotunda works with the local-first OpenClaw and Hermes agents and with Playwright.checked 9 Oct 2026
- Intended use
- Rotunda says it is intended for personal agents acting on a user's network and advises against using it for crawling.checked 9 Oct 2026
- Known limitation
- The maker says fingerprint blocking can still occur and suggests checking whether the same site flags a normal Chrome or Firefox session.checked 5 Oct 2026
- License
- The site identifies Rotunda as open source under the MPL-2.0 license.checked 9 Oct 2026
- Local installation
- Rotunda installs as a Python package through uv, downloads its patched Firefox build, and requires no hosting layer.checked 5 Oct 2026
- Local storage
- The site says Rotunda stores persistent browser profiles, including cookies, sessions, downloads, and history, under ~/.rotunda.checked 9 Oct 2026
- Maintainer support
- The maker recommends filing a GitHub issue with a debug dump when Rotunda alone appears to be flagged.checked 5 Oct 2026
- Open source
- Rotunda’s site identifies the project as open source under the MPL-2.0 license.checked 5 Oct 2026
- Page actions
- Its CLI supports describing page elements, clicking, hovering, filling and typing into fields, screenshots, downloads, and extracting page content.checked 9 Oct 2026
- Persistent profiles
- Browser profiles for each agent retain cookies, sessions, downloads, and history under ~/.rotunda.checked 5 Oct 2026
- Playwright
- Rotunda provides a Playwright browser and context, and the site says existing locators, selectors, and events work natively.checked 5 Oct 2026
- Product
- Rotunda describes itself as an agent-first browser forked from Firefox for agents running locally on a user's laptop and home network.checked 9 Oct 2026
- Protocol
- Rotunda uses Firefox's Juggler protocol with Playwright rather than Chrome's CDP, which it says isolates driver commands from the page context.checked 9 Oct 2026
- Support
- For suspected fingerprinting issues, the site instructs users to enable ROTUNDA_DEBUG_DUMP and file an issue with the dump.checked 9 Oct 2026
- Telemetry
- The site says Rotunda requires no hosting layer and has no telemetry.checked 9 Oct 2026
Where it runs
- Browser control
- Rotunda supports Playwright through its browser and context helpers, and also offers a CLI for agent browser actions.checked 9 Oct 2026
- Fingerprint approach
- Rotunda says it reports the host's real GPU, audio drivers, and platform while varying human-variable attributes such as fonts, extensions, and screen size.checked 9 Oct 2026
The company
- Maker
- The site footer attributes Rotunda to MonkeySee-AI; it does not state a headquarters or founding date.checked 5 Oct 2026
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