Violentmonkey provides userscripts support for browsers. It works on browsers with WebExtensions support.

Example Firefox add-ons created using the WebExtensions API

ClearURLs is an add-on based on the new WebExtensions technology and will automatically remove tracking elements from URLs to help protect your privacy.

Tree Style Tab, Show tabs like a tree.

⚡️ A template for building cross browser extensions for Chrome, Opera & Firefox.

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

An awesome browser extension that reads aloud webpage content with one click

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

📕 Barebones boilerplate with Parcel 2, options handler and auto-publishing

Fast, open and free-to-use new tab page for modern browsers

🔑✅ An alternative to Twitter's verified accounts powered by Keybase.

Chrome/Firefox extension for pen-testing to retrieve encryption keys of Widevine protected content !DON'T DECRYPT CONTENT UNLESS YOU HAVE THE RIGHT TO DO IT!

A WebExtension that lets you fix sound problems in e.g. YouTube videos

UI for create-web-ext

Block distracting websites when you are browsing the web. Use for procrastination.

A client for scuttlebutt network as a Firefox WebExtension

A devtools extension for toggling CSS features allowing developers to see how pages/apps render in browsers that don't support modern CSS features

Change colors of contribution graph in GitHub.

WebExtension for keyboard-accessible tab management

WebExtension for the Anime Reverse Search Engine to search by image