Build Better Browser Extensions for Developers and AI

AddFox

AddFox Introduction

👉 https://addfox.dev 👉 github: https://github.com/addfox/addfox 👉 npm: https://www.npmjs.com/package/addfox

If you’ve built extensions recently, you’ve probably used tools like WXT or Plasmo. They’ve pushed the ecosystem forward a lot — better DX, faster builds, less boilerplate. But I built something a bit different: Addfox("Addon + Fox"). I want to "Build Better Extensionsfor Developers and AI".

⚡ What is Addfox? Addfox is a browser extension framework built on top of Rsbuild / Rstack. ⚡ Rust-powered build performance 🧩 More predictable bundling behavior 🧩 Content UI support. Built-in createContentUI method for easy integration of Iframe, ShadowDom, and native content. 🧩 Framework agnostic. Vanilla, Vue, React, Preact, Svelte, Solid — use what you like 🧩 Zip on build. Build automatically outputs an extension zip package 🧩 Enable terminal error output with --debug. Capture all extension errors without browser DevTools, so you can Ask AI directly in any editor 🧩 Skills support for Agents 🧩 llms.txt and markdown metadata support For more features, please visit the official website

📦 Current status Beta released Core workflow is stable Not supporting Safari right now Still iterating based on real-world usage

If you’ve ever felt constrained by existing extension frameworks, or just want something faster and more transparent, give it a try.

Would love to hear how it compares to your current setup.

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More about AddFox

Pricing
Free
Platforms
Web
Founded
2026
Listed
Apr 03, 2026
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