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browser-testing-with-devtools

Automate web app testing and debugging with Chrome DevTools MCP.

Updated Jun 22, 2026
Search Tags:#Chrome DevTools#browser testing#network analysis#performance profiling#UI debugging
One-click install
npx skills add https://github.com/J03Fr0st/mithril --skill browser-testing-with-devtools-j03fr0st
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: browser-testing-with-devtools
Source: https://github.com/J03Fr0st/mithril/tree/main/skills/browser-testing-with-devtools
Command: npx skills add https://github.com/J03Fr0st/mithril --skill browser-testing-with-devtools-j03fr0st

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires chrome-devtools-mcp, and includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill simplifies testing and debugging of web applications in real browsers, eliminating the need for manual checks and providing automated insights into UI, network, and performance issues.

Core Features & Use Cases

  • Real Browser Testing: Utilizes Chrome DevTools MCP for live browser execution, enabling real-time debugging and verification.
  • UI Debugging: Inspects the DOM, styles, and accessibility, aiding in the diagnosis of UI bugs and issues.
  • Network Analysis: Captures and analyzes network requests and responses to ensure proper API interaction.
  • Performance Profiling: Tracks performance metrics like LCP, CLS, and INP, helping to identify bottlenecks.
  • Use Case: For a developer tasked with fixing a visual layout issue in a web application, this Skill can automate the process of capturing screenshots, inspecting the DOM, and analyzing styles, ensuring the fix is implemented correctly.

Quick Start

Run a performance trace on the web page 'https://example.com' to identify loading bottlenecks.

Frequently Asked Questions about browser-testing-with-devtools

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I automate real-time browser testing and debugging for web applications?▼

Automate real-time browser testing and debugging by utilizing Chrome DevTools to inspect the DOM, capture screenshots, and verify UI fixes without manual checks. This provides automated insights into UI, network, and performance issues.

What is the best way to diagnose UI bugs and inspect web application styles?▼

Diagnose UI bugs by inspecting the DOM, styles, and accessibility directly within Chrome DevTools. This approach aids in identifying visual layout issues and ensures that style fixes are implemented correctly in real-time.

How do I capture and analyze network traffic to ensure proper API interaction?▼

Capture and analyze network traffic using Chrome DevTools to monitor API requests and responses. This ensures proper API interaction by automatically logging network conditions and diagnosing connection or payload issues.

Can I track performance metrics like LCP, CLS, and INP to identify loading bottlenecks?▼

Track performance metrics including LCP, CLS, and INP through Chrome DevTools performance profiling. This identifies loading bottlenecks by running real-time traces on web pages and highlighting specific rendering delays.

Do I need the chrome-devtools MCP server to run live browser debugging?▼

Yes, live browser debugging requires the chrome-devtools MCP server and proper agent configuration. This setup enables real-time execution and verification within a live browser environment for accurate testing.

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