Extension Boilerplate

In plain words

Extension Boilerplate is a development tool that provides a foundation for building browser extensions compatible with Chrome, Firefox, and Opera. It streamlines the cross-browser extension development process by offering pre-configured code structure and configuration files. The tool is designed for developers who need to create extensions that work consistently across multiple browsers without building from scratch each time.

written from the facts on this page · September 2026

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  Hello HN! I'm the creator and solo developer of Extension.js, a development tool for browser extensions with built-in support for TypeScript, WebAssembly, React, and modern JavaScript. Developers use it to spend less time configuring the compilation config or learning new frameworks and more time actually writing code. Most projects similar to Extension.js rely on some sort of abstraction or configuration to get started, making the initial development process slow given the extra learning curve and setup guidelines. By using Extension.js, adding the package to your npm scripts is all it…

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