How do I install the Browser Required skill?

Run npx skillmds@latest add thedaviddias/browser-required in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Browser Required safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Browser Required?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Browser Required free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Browser Required?

thedaviddias (@thedaviddias) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Browser Required by thedaviddias — Agent Skill

Name: Browser Required
Author: thedaviddias

Browser Required

Use when auditing slow page loads, heavy assets, or rendering delays related to Perform browser-based performance audits. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes.

thedaviddias 2a181f8 2 files · 5.5 KB Updated Sep 17, 2026

File contents

Perform browser-based performance audits

Static analysis alone cannot simulate the complex rendering, script execution, and layout processes of modern web browsers, which is essential for capturing real-world performance.

Quick Reference

Use real browser engines to capture runtime metrics (LCP, CLS, INP)
Synthetic tests in full browsers reveal execution bottlenecks
Verify performance across different device and connection simulations

Check

Ensure that performance audits are conducted in an environment that executes JavaScript and renders the page (e.g., Lighthouse, Puppeteer).

Fix

Integrate browser-based testing tools like Lighthouse or WebPageTest into the development workflow and CI/CD pipeline.

Explain

Explain the limitations of static analysis for performance and why a full browser environment is necessary.

Code Review

Review the routes, assets, and loading behavior that affect Perform browser-based performance audits. Flag exact files, requests, or rendering steps that add unnecessary network, CPU, or layout cost, and describe the measurement method used to confirm the issue.

For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/en/rules/performance/browser-required

Frequently asked questions