I'm a software developer working on the browser extension ecosystem from prototyping to distribution.
When Claude Code, Cursor, or Copilot builds, runs, or publishes a browser extension, this is the rail I'm building for it. Platform docs at docs.extension.dev.
Founder
Extension.dev is the platform that takes an extension from the first line of code to the store.
An MCP server gives agents tools to run, inspect and publish. An Agent Skill teaches store rules.
Creator and maintainer
Extension.js is the open source framework the platform is built on, and its developer channel.
One workflow to create, develop, build and preview across Chrome, Edge, Firefox and Safari.
Try it, no account needed:
npx extension@latest create my-extensionI'm also the author of open source modules on npm. My story as a maintainer is featured in maintaine.rs, a book about the people behind the open source projects the web runs on. If you think we could partner up on something, email me at boss@cezaraugusto.net.