Browser automation tools that connect to Chrome through its developer-control interface. They can open pages, run JavaScript, take screenshots, and help select page elements.

Use them to navigate websites, run checks in the current page, capture screenshots, pick DOM elements, and scrape information.

They remove the need to control a browser manually when exploring websites or collecting page data. They also provide a direct way to inspect what a page contains.

browser — Skill for Claude Code and Codex by julianromli

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.

Any agent

npx skills add julianromli/droid-factory-template --skill browser

Clone the repo

git clone --depth 1 https://github.com/julianromli/droid-factory-template

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/julianromli/droid-factory-template/browser/github.svg)](https://agentmods.dev/skills/julianromli/droid-factory-template/browser)

Your own site

<a href="https://agentmods.dev/skills/julianromli/droid-factory-template/browser"><img src="https://agentmods.dev/badge/skills/julianromli/droid-factory-template/browser/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/julianromli/droid-factory-template/browser"><img src="https://agentmods.dev/badge/skills/julianromli/droid-factory-template/browser.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 436 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00039	$0.00436
Opus 5.5	$0.00016	$0.00174
Sonnet 5.5	$0.00008	$0.00087
Haiku 4.5	$0.00004	$0.00044

Measured 2mo ago against content hash f565f52d08cb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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 2mo ago.

The scan reads SKILL.md. This mod also ships 34 executable files (eval.js, nav.js, node_modules/.bin/browsers.cmd, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/browser/SKILL.md · 67 lines

What it actually says

Browser Tools

Minimal CDP tools for collaborative site exploration and scraping.

IMPORTANT: All scripts are located in ~/.factory/skills/browser/ and must be called with full paths.

Start Chrome

~/.factory/skills/browser/start.js              # Fresh profile
~/.factory/skills/browser/start.js --profile    # Copy your profile (cookies, logins)

Start Chrome on :9222 with remote debugging.

Navigate

~/.factory/skills/browser/nav.js https://example.com
~/.factory/skills/browser/nav.js https://example.com --new

Navigate current tab or open new tab.

Evaluate JavaScript

~/.factory/skills/browser/eval.js 'document.title'
~/.factory/skills/browser/eval.js 'document.querySelectorAll("a").length'

Execute JavaScript in active tab (async context).

IMPORTANT: The code must be a single expression or use IIFE for multiple statements:

Single expression: 'document.title'
Multiple statements: '(() => { const x = 1; return x + 1; })()'
Avoid newlines in the code string - keep it on one line

Screenshot

~/.factory/skills/browser/screenshot.js

Screenshot current viewport, returns temp file path.

Pick Elements

~/.factory/skills/browser/pick.js "Click the submit button"

Interactive element picker. Click to select, Cmd/Ctrl+Click for multi-select, Enter to finish.

Usage Notes

Start Chrome first before using other tools
The --profile flag syncs your actual Chrome profile so you're logged in everywhere
JavaScript evaluation runs in an async context in the page
Pick tool allows you to visually select DOM elements by clicking on them

Files

What ships with it

60 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

2mo ago First seen · 67 lines · 39 tokens per session scan A f565f52d08cb

Subscribe to this mod's changes

browser is a skill published in the GitHub repository julianromli/droid-factory-template (53 stars, last pushed 10mo ago), licensed MIT. It adds 39 tokens to every session and 436 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-30.

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