Does this skill support Manifest V3?

Yes, it is specifically designed for modern Manifest V3 standards, including service workers, declarativeNetRequest, and the latest security permission models.

Does it help with creating extension user interfaces?

Yes, it includes patterns for popup interfaces, options pages, and techniques for injecting custom UI elements directly into existing web pages via content scripts.

How does it handle extension security and permissions?

It emphasizes the principle of least privilege, guiding you to request only the minimum necessary permissions to ensure user trust and faster Web Store reviews.

Can I build extensions for both Firefox and Chrome?

Absolutely. The skill provides guidance on cross-browser compatibility, ensuring your extension works seamlessly across Chromium-based browsers and Firefox.

Browser Extension Builder

Name: Browser Extension Builder
Author: claudiodearaujo

byclaudiodearaujo

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Browser Automation

Builds production-grade Chrome and Firefox extensions using Manifest V3 architecture and best practices for security and performance.

Browser Extension Builder is a specialized Claude Code skill designed to guide developers through the entire lifecycle of extension development. From setting up the initial Manifest V3 architecture and handling cross-browser compatibility to implementing complex content scripts and background service workers, this skill ensures extensions are secure, performant, and compliant with store policies. It provides structured patterns for inter-component communication and efficient state management while helping developers avoid common pitfalls like over-permissioning or inefficient resource usage, making it ideal for creating everything from simple tools to complex Micro-SaaS products.

Key Features

011 GitHub stars

02Manifest V3 architecture and project scaffolding

03Chrome Storage API integration for persistent state

04Content script injection and DOM manipulation patterns

05Publishing guidance for Chrome Web Store and Firefox Add-ons

06Background service worker and messaging implementation

Use Cases

01Creating a productivity tool that modifies specific web page elements

02Building a Micro-SaaS extension with monetization and popup interfaces

03Migrating legacy Manifest V2 extensions to the modern Manifest V3 standard

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add claudiodearaujo/sistema-de-narra-o-de-livro browser-extension-builder

For use in Claude.ai and ChatGPT

Download Skill