🧩 Extension

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 requires no extra knowledge to get started.

Create cross-browser extensions with no build configuration.

Extension default template

Create A New Extension

Extension has a default create command that allows you to generate the foundations of your next extension project (see demo above). It also supports templates via --template flag.

npx extension create <your-extension-name>

For a list of all supported templates, see Templates.

Usage With An Existing Extension

If you have an existing extension which is using a package manager, you can install the Extension package and manually create the scripts used to run your extension. See the demo above or follow these instructions to get it done:

Step 1 - Install Extension as a devDependency

npm install extension --save-dev

Step 2 - Link your npm scripts with the executable Extension commands

  "scripts": {
    "build": "extension build",
    "dev": "extension dev",
    "start": "extension start"
  "devDependencies": {
    // ...other deps,
    "extension": "latest"

Done. You are all set!

  • To develop the extension, run npm run dev.
  • To visualize the extension in production mode, run npm run start.
  • To build the extension in production mode, run npm run build.

Next Steps

🧩 Extension • create cross-browser extensions with no build configuration.