browser-extension-developer
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.
Source facts
- Repository
- yamadashy/repomix
- Last source activity
- January 23, 2026 at 15:53
- Detected SKILL.md language
- English
- Stars
- 28,434
- Forks
- 1,538
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SKILL.md
Source instructions · Read-only preview- 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
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