Awesome-WebExtensions

Documentation for the original Chrome extension model

MDN wiki for the WebExtensions API

Compatibility table for Chrome, Edge, Firefox, and Opera

Developer documentation on building Safari extensions. Technically not WebExtensions, the API is completely different

Detailed WebExtensions support for Opera

Standard for the API, supported by Mozilla, Opera and Microsoft

Discussions

Discussions

Matrix channel by Mozilla

Relevant questions

Relevant questions

Relevant questions

webext-options-sync

Helps you manage and autosave your extension's options

webext-storage-cache

Map-like promised cache storage with expiration

webext-dynamic-content-scripts

Automatically inject your on custom domains

mozilla/webextension-polyfill

Polyfill to support the standardized promise based API in the namespace

Supplies TypeScript types for the namespace

redux-webext

Uses Redux for managing the state of your WebExtension

ExtPay

Take secure payments in extensions without needing to run a server backend

inject-react-anywhere

Inject React components into 3rd party sites with convenient API and styles isolation

Chrome Webstore Upload

Upload the extension to the Chrome Web Store via cli (or on Travis, automatically)

mozilla/web-ext

Command line tool to help build, run, and test WebExtensions

chromepet

Get notified when your new version has been published

chrome-ext-downloader

Download any extension on Chrome Web Store to see how they do it

chrome-store-api

Chrome Web Store API wrapper

Chrome extension source viewer

WebExtension to view source code of extensions directly on the store

@wext/shipit

Tool to automatically publish to Chrome Web Store, Mozilla Addons and Opera Addons

wext-manifest-loader

Webpack loader that lets you specify properties to appear only in specific browsers

webextension-manifest-loader

Webpack loader that loads browser tailored manifest.json. It also imports all importable properties, allowing you to have 'manifest.json' as your only webpack entry point

webpack-extension-reloader

A Webpack plugin to automatically reload browser extensions during development

webpack-target-webextension

Adds code-splitting support to WebExtensions build with Webpack

Extension.js

Plug-and-play, zero-config, cross-browser extension development tool

sinon-chrome

Mocks the Chrome Extensions API for testing

addons-linter

Validate an extension against Mozilla's guidelines

webextensions-jsdom

Load popup, sidebar and background with JSDOM based on the manifest.json

webextensions-api-fake

In-memory WebExtensions API Fake Implementation (includes TypeScript types)

webextensions-api-mock

WebExtensions API as sinon stubs (includes TypeScript types)

webextensions-schema

Programmatically consume the WebExtensions Schema JSON files

browser-extension-template

Barebones boilerplate with parcel, options handler and auto-publishing

create-webextension

Yarn WebExtension generator

generator-web-extension

WebExtension generator that creates everything you need to get started with cross-browser web-extension development

WXT

Next-gen framework for developing web extensions

mdn/webextension-examples

Various example extensions curated for the MDN documentation