What is agent-browser?

A set of tools for controlling web browsers automatically and creating Playwright tests. Playwright is a browser-testing framework used to check real user actions such as clicking, typing, and navigating.

Use it for browser automation, generating end-to-end tests, and debugging web applications through the agent-browser command-line tool and Playwright workflows.

It reduces repetitive manual browser checks and helps turn browser interactions into repeatable tests. It also supports investigating problems in web pages.

agent-browser — Plugin by musingfox

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code

/plugin marketplace add musingfox/cc-plugins

agentmods

npx agentmods add plugins/musingfox/cc-plugins/agent-browser

Clone the repo

git clone --depth 1 https://github.com/musingfox/cc-plugins

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

agent-browser scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agent-browser/.claude-plugin/plugin.json · 12 lines

What it actually says

{
  "name": "agent-browser",
  "version": "0.1.2",
  "description": "Skills for browser automation with agent-browser CLI, Playwright test generation, and web debugging workflows",
  "author": {
    "name": "musingfox"
  },
  "repository": "https://github.com/musingfox/cc-plugins",
  "license": "MIT",
  "keywords": ["browser", "testing", "playwright", "agent-browser", "e2e", "automation"]
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

yesterday First seen · 12 lines scan A 216940aed3d6

Subscribe to this mod's changes

agent-browser is a plugin published in the GitHub repository musingfox/cc-plugins (2 stars, last pushed 2d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Browser automation Debugging Testing

agent-browser

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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