[Project] firefox-source-docs-l10n

### Project Request

- **Project ID:** firefox-source-docs-l10n
- **Project Name:** Localization of Firefox Source Tree Documentation
- **Project Docs Url:** https://github.com/mozilla-firefox/firefox.git

### Generator

Sphinx

### Checklist

- [x] The Project is not requested yet.
- [x] The Project ID is unique.