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firefox-extension-dev

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Reference knowledge base for Firefox WebExtension development. Contains browser API reference, manifest schema, AMO publishing guide, MDN URL index, and best practices. Used by the firefox-extension-dev agent for documentation lookup. TRIGGER WHEN: building, implementing, writing, coding, creating, debugging, or publishing a Firefox/WebExtension add-on (manifest.json, browser.* APIs, AMO submission, web-ext CLI). DO NOT TRIGGER WHEN: targeting Chrome-only extensions, Safari extensions, or userscripts/bookmarklets.

Backend & APIs

What this skill does


# Firefox Extension Development References

This skill provides reference files for the `firefox-extension-dev` agent. The agent handles all active development work (scaffolding, coding, debugging, publishing). These reference files serve as its knowledge base.

## Reference Files

- `references/browser-api-reference.md` - Complete list of all 51 browser.* APIs with methods, events, and permissions
- `references/manifest-schema.md` - Full manifest.json key reference with MV2/MV3 examples
- `references/amo-publishing.md` - AMO publishing checklist, review policies, CSP, security best practices, i18n
- `references/mdn-api-urls.md` - Direct MDN URL index for all browser.* APIs, manifest keys, and Extension Workshop resources
- `references/best-practices.md` - Best practices, pitfalls, and anti-patterns: JS patterns, Workers, sessions, startup, security, performance, cross-browser

Related in Backend & APIs