
Description: Tampermonkey is a popular browser extension that allows users to install userscripts - little bits of JavaScript that make changes to web pages. It works by injecting code into pages as they load. Tampermonkey makes it easy to customize web pages and automate tasks in the browser.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: GreaseKit is an open-source browser extension framework for Google Chrome and Firefox. It allows developers to build browser extensions using standard web technologies like HTML, CSS, and JavaScript.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API