GitHub - PlasmoHQ/plasmo: 🧩 The Browser Extension Framework

Create cross-browser extensions with no build configuration.

• Create A New Extension — How to create a new extension.


• Get Started Immediately — Get work done in no time.


• I have An Extension - Use only specific parts of Extension.js .

Extension.js is a plug-and-play, zero-config, cross-browser extension development tool with built-in support for TypeScr... See more

Welcome to Extension

Extension is a plug-and-play, zero-config, cross-browser extension development tool for browser extensions with built-in support for TypeScript, WebAssembly, React, and modern JavaScript.

Designed with practicity and fast prototyping in mind, running a single terminal command is enough to start developing your extension and requ... See more

Platformless: not inherently tied to any centralized platform or tool.

To build Casca Extension, we used a bunch of different technologies such as:

• React, Tailwind and React Grid Layout to make the extension fast, scalable and beautiful


• IndexedDB to store large data right in the browser


• Node.js, Express and MongoDB to proxy, map and cache external API requests


• Sharp library to compress large images


• NGINX serves as a l

... See more