Hello there! I’m a Brazilian software engineer and open-source author focused on browser extension tooling. I’m is the creator of Extension.js and the founder of Extension Dev, building infrastructure that treats extensions as serious software products rather than side projects.
I created Extension.js to make cross-browser extension development straightforward. It avoids abstracting the WebExtension APIs, so developers get a clear view of what’s happening under the hood. What started as a teaching tool became a philosophy: clarity over magic.
Lately, I’ve been working on Extension Dev and exploring how releases, previews, CI, and distribution across browsers can feel as natural as deploying a modern web app. Extensions are still treated as second-class citizens in tooling.
This Substack is where I share weekly notes on open source, developer experience, and the process of building tools. It’s a space to document experiments, trade-offs, failures, and long-term thinking.
