Extension.dev is the platform for shipping browser extensions. It carries a project from the first line of code to the store: develop, preview, and ship to Chrome, Firefox, Safari, and Edge from one push, by hand or through @extension.dev/mcp, the MCP server that gives coding agents the tools to scaffold, run, inspect the live DOM, and publish. Built on Extension.js, the open source framework with 5k+ GitHub stars and npm downloads that tripled in the past year to 25k+ a month. Founded by Cezar Augusto, creator of Extension.js and previously Senior Engineer at Brave.
| Website | https://extension.dev |
| Employees | 1 (1 on RocketReach) |
| Founded | 2026 |
| Industry | Technology, Information and Internet |
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Cezar Augusto is the Founder of Extension.js.
1 people are employed at Extension.js.
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Cezar Augusto
Founder at Extension.js
Rio de Janeiro, RJ, BR2
