Show HN: AddFox – Build Better Browser Extensions for Developers and AI

Category: devtools

Tags: browser-extensions, build-tool, hmr, rsbuild, typescript

Score: 6.5/10 (Innovation: 5, Technical: 7, Documentation: 8, Utility: 6)

Addfox is a browser extension development framework built on Rsbuild (Rstack) that provides fast builds, real HMR for all extension contexts, and cross-browser support for Chrome and Firefox. It differentiates itself through performance (fastest dev startup in its class), minimal conventions, and AI-ready features like llms.txt generation.

Target audience: frontend devs, browser extension developers

Repository: https://addfox.dev · TypeScript · MIT · 125 stars

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