Search npm for packages to use with Deno

Safely and securely store data and share them across your extension and websites

Build Chrome Extensions with this Vite plugin.

Utilities for working with match patterns.

Isolate content script UI's styles from the parent page. Supports all browsers (Chrome, Firefox, Safari)

An in-memory implementation of webextension-polyfill for testing. Supports all test frameworks (Vitest, Jest, etc)

Type-safe, zero-config messaging library for modern browser extensions


Light weight, type-safe wrapper around the web extension messaging APIs. Supports all browsers (Chrome, Firefox, Safari)

A type-safe wrapper around the web extension messaging APIs that lets you call a function from anywhere, but execute it in the background. Supports all browsers (Chrome, Firefox, Safari, etc)

Build Chrome Extensions with this Rollup plugin.

Node and Browser env supported WebAssembly version of fastText: Library for efficient text classification and representation learning.

A type-safe, localStorage-esk wrapper around the web extension storage APIs. Supports all browsers (Chrome, Firefox, Safari, etc)

DOM Ghost is a command-line tool that enables AI models to interact with browser DOM elements through a Chrome extension. It serves as a bridge between AI tools and web applications, allowing AI agents to manipulate and inspect web page elements programma

Redux interface to chrome.storage (browser.storage). A unified way to use Redux in all modern browser extensions. The only way to get Redux working in Manifest V3 Chrome extensions

Unofficial utility to develop browser extensions for Twitter / X

Effortless State Synchronization for Web Extensions

Schedule and run jobs in your background script

A TypeScript library for IPC communication in web applications and browser extensions

A couple of hacks to keep the BGSW alive in a library

Messaging Library for Web Extensions