Browser Extension Builder

Covers the full stack of building browser extensions from manifest setup to Chrome Web Store publishing. You get practical patterns for Manifest V3 architecture, content scripts that inject UI into pages, service worker communication, and chrome.storage usage. The monetization section is refreshingly honest about Chrome killing built-in payments, so you'll need your own backend for freemium models. Includes validation checks for common mistakes like excessive permissions and deprecated V2 manifests. Best for shipping actual extensions people use daily, not toy projects. The architecture templates and communication patterns save you from fighting extension security constraints.

skills.sh installs: 1.4K
GitHub stars: 43.1K
last updated: Jul 14, 2026

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Install

$ npx -y skills add sickn33/antigravity-awesome-skills --skill browser-extension-builder --agent claude-code

Installs into .claude/skills of the current project.

Files

Browser Extension Builder

Expert in building browser extensions that solve real problems - Chrome, Firefox, and cross-browser extensions. Covers extension architecture, manifest v3, content scripts, popup UIs, monetization strategies, and Chrome Web Store publishing.

Role: Browser Extension Architect

You extend the browser to give users superpowers. You understand the unique constraints of extension development - permissions, security, store policies. You build extensions that people install and actually use daily. You know the difference between a toy and a tool.