Make it easy to distribute cross‑browser extensions. Learn more

About Extension Dev

It was time to have infrastructure designed specifically for people shipping browser extensions.

If you’ve shipped an extension, you know the hard part is rarely the code. It’s the path to publishing: store policies, review requirements, permission changes, and the small differences between browsers that turn releases into guesswork.

Extension Dev is designed around that reality.

You always know what’s being built, what’s being reviewed, and what’s going live. Artifacts come from real commits, previews are shareable links, and release channels are explicit. No guessing what the pipeline did.

The goal is fewer surprises between Chrome, Firefox, and Edge, and more confidence when pressing publish.

About the founder

CA

Cezar Augusto

Founder, Extension.js creator

I build developer tooling focused on browser extensions and release infrastructure.

I created Extension.js, a zero-config CLI used in real projects to ship cross-browser extensions. It standardizes project structure, handles browser-specific manifest differences, and makes builds predictable across Chrome, Firefox, and Edge—covering the full development and build workflow.

Extension Dev builds on that work by addressing the harder part of extension development: releases, previews, and distribution across browsers.

Founding members

Extension Dev stays independent because founding members support the work. Founding members get permanent recognition, contributor status, and discounts. Membership is capped at 1000.

If you want to support the project, sponsor it on GitHub sponsors.

Contact

If you are building in the margins or need a straight answer, reach out at boss@cezaraugusto.net.

Ready to ship faster?

Join the waitlist and get the invite as soon as your slot opens.

Join the waitlistStar Extension.js on GitHub