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 follows the SKILL.md standard. Use the install command to add it to your agent stack.
--- 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 ```plaintext 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