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Claude-Code-Community-Ireland
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Browser Extension Builder

Build Chrome and Firefox browser extensions with Manifest V3.

10|5|Updated Jan 29, 2026
Search Tags:#web development#chrome extension#content script#browser extension#manifest v3#firefox addon
One-click install
npx skills add https://github.com/Claude-Code-Community-Ireland/claude-code-resources --skill browser-extension-builder
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Browser Extension Builder
Source: https://github.com/Claude-Code-Community-Ireland/claude-code-resources/tree/main/skills/general/browser-extension-builder
Command: npx skills add https://github.com/Claude-Code-Community-Ireland/claude-code-resources --skill browser-extension-builder

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill helps users build robust and user-friendly browser extensions for Chrome, Firefox, and other browsers, streamlining workflows and adding new functionalities to the browsing experience.

Core Features & Use Cases

  • Extension Architecture: Design and structure new browser extensions.
  • Manifest V3 Compliance: Build extensions compatible with the latest manifest version.
  • Content Scripting: Inject custom logic and UI into web pages.
  • Background Workers: Implement background processes for extension logic.
  • Cross-Browser Compatibility: Ensure extensions work across different browsers.
  • Use Case: Develop a Chrome extension that automatically summarizes articles on a webpage or a Firefox addon that enhances the user interface of a specific website.

Quick Start

Use the browser-extension-builder skill to create a basic manifest.json file for a Chrome extension.

Frequently Asked Questions about Browser Extension Builder

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

FAQPage Schema
How do I build a browser extension with Manifest V3?▼

To build a browser extension with Manifest V3, you structure a manifest.json file, design the extension architecture, implement content scripts, and configure background workers using JavaScript, HTML, and CSS.

Can I use the same codebase for a Chrome extension and a Firefox addon?▼

You can build cross-browser compatible extensions for Chrome and Firefox by following Manifest V3 standards, using shared extension architecture, and implementing browser-agnostic content scripting and background workers.

Do I need JavaScript to create a content script for web pages?▼

Yes, you need JavaScript, along with HTML and CSS, to create content scripts that inject custom logic and popup UIs into web pages via the browser extension APIs.

How do I publish a browser extension to the Chrome Web Store?▼

Publishing a browser extension to the Chrome Web Store involves packaging your Manifest V3 compliant project, setting up the extension architecture, and submitting the finalized content scripts and background workers.

What is the best way to monetize a browser extension?▼

Monetizing a browser extension can be achieved by designing specific background worker logic and popup UIs that support premium features within your Manifest V3 architecture before Chrome Web Store publishing.

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