github-hovercard - Neat hovercards for GitHub.

•    Javascript

Neat hovercards for GitHub. See Adding and removing extensions for Microsoft Edge.

stravistix - Browser extension for strava

•    TypeScript

You should be able to install it in all Chrome based browser such as Chrome, Chrome Canary, Chromium, Opera, Vivaldi, Yandex, and more ... Go to chapter Environnement setup.

webextensions-examples - Example Firefox add-ons created using the WebExtensions API

•    Javascript

Maintained by the MDN team at Mozilla. WebExtensions are a way to write browser extensions: that is, programs installed inside a web browser that modify the behaviour of the browser or of web pages loaded by the browser. They are built on a set of cross-browser APIs, so WebExtensions written for Google Chrome or Opera will in most cases run in Firefox or Edge too.

news-feed-eradicator - A browser extension that deletes your Facebook news feed and replaces it with a nice quote

•    TypeScript

A browser extension that deletes your Facebook news feed and replaces it with a nice quote. This plugin is built as a WebExtension - a standard for browser plugins currently supported in both Chrome and Firefox.

Awesome-WebExtensions - A curated list of awesome resources for WebExtensions development.

•    Javascript

A curated list of awesome resources for WebExtensions development. WebExtensions are a cross-browser system for developing browser add-ons. To a large extent the system is compatible with the extension API supported by Google Chrome and Opera. Extensions written for these browsers will in most cases run in Firefox or Microsoft Edge with just a few changes.

Awesome-WebExtensions - A curated list of awesome resources for WebExtensions development.

•    Javascript

A curated list of awesome resources for WebExtensions development. WebExtensions are a cross-browser system for developing browser add-ons. To a large extent the system is compatible with the extension API supported by Google Chrome and Opera. Extensions written for these browsers will in most cases run in Firefox or Microsoft Edge with just a few changes.

web-ext - A command line tool to help build, run, and test web extensions

•    Javascript

A command line tool to help build, run, and test web extensions

adblockpluschrome - Adblock Plus browser extension

•    Javascript

This repository contains the platform-specific Adblock Plus source code for Chrome, Opera, Microsoft Edge and Firefox. It can be used to build Adblock Plus for these platforms, generic Adblock Plus code will be extracted from other repositories automatically (see dependencies file). Note that the Firefox extension built from this repository is the new WebExtension. The source code of the legacy Adblock Plus extension can be found here.

LargeLocalStorage - Problem: You need to store a large amount of key-value based data in IE, Chrome, Safari, AND Firefox

•    Javascript

Problem: You need a large key-value store in the browser. LargeLocalStorage bridges all of that to give you a large capacity (up to several GB when authorized by the user) key-value store in the browser (IE 10, Chrome, Safari 6+, Firefox, Opera).

BassoonTracker - Webbased old-school Amiga music tracker in plain old javascript - Plays and edits Amiga Mod files and FastTracker XM files

•    Javascript

Browser based old-school Amiga Music Tracker in plain old javascript. It needs a modern browser that supports WebAudio. It's tested to work on Chrome, Firefox, Safari, Edge, Chrome on Android, mobile Safari and the Samsung Android Browser. It works best in Chrome.

push - Push notifications for cordova (ios, android) browser (Chrome, Safari, Firefox)

•    Javascript

Push notifications for cordova (ios, android) browser (Chrome, Safari, Firefox) - One unified api on client and server. We are using semantic-release following the AngularJS Commit Message Conventions - Following this pattern will result in better versioning, better changelog and shorter release cycle.

wpt - Test suites for Web platform specs — including WHATWG, W3C, and others

•    HTML

The web-platform-tests Project is a W3C-coordinated attempt to build a cross-browser testsuite for the Web-platform stack. Writing tests in a way that allows them to be run in all browsers gives browser projects confidence that they are shipping software that is compatible with other implementations, and that later implementations will be compatible with their implementations. This in turn gives Web authors/developers confidence that they can actually rely on the Web platform to deliver on the promise of working across browsers and devices without needing extra layers of abstraction to paper over the gaps left by specification editors and implementors. Clone or otherwise get https://github.com/web-platform-tests/wpt.

object-assign - ES2015 Object.assign() ponyfill

•    Javascript

Node.js 4 and up, as well as every evergreen browser (Chrome, Edge, Firefox, Opera, Safari), support Object.assign() 🎉. If you target only those environments, then by all means, use Object.assign() instead of this package.Assigns enumerable own properties of source objects to the target object and returns the target object. Additional source objects will overwrite previous ones.

octotree - Code tree for GitHub

•    Javascript

Find the extension folder in tmp/safari. Follow Apple instructions to install the extension to your browser. Prebuilt packages are available in the dist folder. For security reason, only download Octotree from this location.

wwwsqldesigner - WWW SQL Designer, your online SQL diagramming tool

•    Javascript

WWW SQL Designer allows users to create database designs, which can be saved/loaded and exported to SQL scripts. Various databases and languages are supported. Ability to import existing database design. Hi and welcome to WWW SQL Designer! This tool allows you to draw and create database schemas (E-R diagrams) directly in browser, without the need for any external programs (flash). You only need JavaScript enabled. The Designer works perfectly in Chrome, Mozilla (Firefox, Seamonkey), Internet Explorer, MS Edge, Safari and Opera.

save-as-ebook - Save a web page/selection as an eBook (

•    Javascript

Save a web page/selection as an eBook (.epub format) - a Chrome/Firefox/Opera Web Extension

notifier-for-github-browser-extensions - Browser extension that displays your GitHub notifications unread count

Available on Chrome, Firefox, Opera, Safari.

chromedp - Package chromedp is a faster, simpler way to drive browsers (Chrome, Edge, Safari, Android, etc) without external dependencies (ie, Selenium, PhantomJS, etc) using the Chrome Debugging Protocol

•    Go

Package chromedp is a faster, simpler way to drive browsers in Go using the Chrome Debugging Protocol (for Chrome, Edge, Safari, etc) without external dependencies (ie, Selenium, PhantomJS, etc).NOTE: chromedp's API is currently unstable, and may change at a moments notice. There are likely extremely bad bugs lurking in this code. CAVEAT USER.

chrome-remote-interface - Chrome Debugging Protocol interface for Node.js

•    Javascript

Chrome Debugging Protocol interface that helps to instrument Chrome (or any other suitable implementation) by providing a simple abstraction of commands and notifications using a straightforward JavaScript API. This module is one of the many third-party protocol clients.

OctoLinker - OctoLinker – Available on Chrome, Firefox and Opera

•    Javascript

OctoLinker is a browser extension for Chrome, Firefox and Opera which allows you to navigate through code on GitHub more efficiently. It turns language-specific module-loading statements like include, require or import into links. Depending on the language it will either redirect you to the referenced file or to an external website like a manual page or another service.