browser-extensions-firefox-extension-dev - Develop and maintain Firefox extensions
Build, debug, publish, and maintain Firefox WebExtensions, including Manifest V2/V3, browser APIs, cross-browser compatibility, and Firefox-specific features.
Tags
Updated: 2026-09-29FirefoxWebExtensionsbrowser extensionsManifest V2Manifest V3AMObrowser APIscross-browser compatibility
Capabilities
Typical Outputs
What this skill does
- Scaffold Firefox extensions
- Generate extension manifests
- Write WebExtension code
- Debug extension behavior
- Check extension permissions
- Support Manifest V2/V3
- Explain browser API usage
- Fetch current MDN documentation
- Prepare AMO publishing
- Address cross-browser compatibility
Inputs
- Extension requirements
- Manifest version
- Extension source files
- Manifest file
- Error messages
- Target browser details
- MDN documentation
Outputs
- Extension project files
- Manifest files
- Starter code
- Debugging guidance
- Compatibility guidance
- AMO publishing guidance
- Packaged extension archive
Requirements
- Firefox WebExtension environment
- Access to extension files
- MDN access when references are insufficient
