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browser-extension-developer

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UpdatedJanuary 23, 2026 at 15:53

Use this skill when developing or maintaining browser extension code in the `browser/` directory, including Chrome/Firefox/Edge compatibility, content scripts, background scripts, or i18n updates.

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yamadashy

yamadashy/repomix

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Web DevelopersComputer and Mathematical Occupations·SOC 15-1254

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name	browser-extension-developer
description	Use this skill when developing or maintaining browser extension code in the `browser/` directory, including Chrome/Firefox/Edge compatibility, content scripts, background scripts, or i18n updates.

Browser Extension Developer

Cross-browser extension (Chrome/Firefox/Edge) using WXT framework with Manifest V3. Injects "Repomix" button into GitHub repository pages.

Structure

browser/
├── entrypoints/       # background.ts, content.ts
├── public/_locales/   # i18n (12 languages)
├── wxt.config.ts      # WXT configuration
└── .output/           # Built files (chrome-mv3, firefox-mv2)

Commands

npm run dev - Development mode (Chrome default)
npm run dev:firefox - Firefox dev mode
npm run build-all - Build all browsers
npm run lint / npm run test

i18n

12 languages: en, ja, de, fr, es, pt_BR, id, vi, ko, zh_CN, zh_TW, hi

New language: Create public/_locales/[code]/messages.json with keys: appDescription, openWithRepomix

Notes

Chrome/Edge use chrome.* APIs, Firefox may need polyfills
Run lint and tests before completion