Can I use this for UI/UX design within the extension?

While it handles the extension architecture, it is designed to work in tandem with the frontend-design skill to apply Atomic Design and Glassmorphism to popups and side panels.

What kind of security checks are included?

The skill includes the 'Sentinel' audit suite, which runs scripts to verify CSP safety, ensure the Principle of Least Privilege for permissions, and sanitize data crossing context bridges.

Does it support cross-browser compatibility?

Yes, it follows modern standards compatible with Chrome, Edge, and Brave, while providing fallback patterns for Firefox support.

How does this skill handle Manifest V3 Service Worker termination?

It implements a 'Persistence Engine' that forbids global variables for state, instead mandating immediate syncing to chrome.storage or IndexedDB and using chrome.alarms as a heartbeat.

Browser Extension Masterclass

Name: Browser Extension Masterclass
Author: xenitV1

byxenitV1

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202

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Herramientas para Desarrolladores

Architects production-grade browser extensions using Manifest V3 with advanced persistence and security protocols.

This skill provides a comprehensive framework for building resilient, modern browser extensions optimized for 2025-2026 standards. It specifically addresses the 'Persistence Paradox' of Manifest V3 by enforcing strict state management across Service Worker terminations using durable storage and heartbeat mechanisms. Beyond core logic, the skill integrates automated audit scripts for manifest compliance, security vetting, and asset optimization, ensuring your extension meets the high performance and safety bars required for modern web stores.

Características Principales

01Least Privilege permission modeling and Declarative Net Request implementation.

02Automated Sentinel audit suite for manifest, state, and asset verification.

03Integrated Side Panel API support for modern, non-intrusive user interfaces.

04Manifest V3 Constitution enforcement to ensure store compliance and security.

05202 GitHub stars

06Persistence Paradox Guard to prevent data loss during Service Worker hibernation.

Casos de Uso

01Migrating legacy Manifest V2 extensions to the modern Service Worker architecture.

02Building secure browser-based tools that leverage the Side Panel and Offscreen APIs.

03Developing complex productivity extensions that require reliable background synchronization.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add xenitv1/claude-code-maestro browser-extension

For use in Claude.ai and ChatGPT

Download Skill