Extension.js command guide#

Choose the right command for the current phase of extension development, from first scaffold to production validation.

Command chooser#

Goal	Command	Example
Scaffold a new project	create	npx extension@latest create my-extension --template=new-react
Develop with watch mode	dev	extension dev --browser=firefox
Build production artifacts	build	extension build --browser=chrome,firefox --zip
Build and launch production output	start	extension start --browser=edge
Launch existing build output only	preview	extension preview --browser=chrome

Typical developer flow#

1. create to bootstrap.
2. dev for iterative coding and reload cycles.
3. build for release artifacts.
4. preview or start for production-like validation.

Command references#

• Create
• Dev
• Build
• Start
• Preview

Next steps#

• Apply cross-command controls in Global flags.
• Keep defaults centralized in Extension config.

Video walkthrough#