
Description: Firefox Developer Tools are a set of web developer tools built into Firefox browser to allow debugging, editing, and profiling web pages and applications. They include features like the Page Inspector, JavaScript Debugger, Network Monitor, Accessibility Inspector, Storage Inspector, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Try It Online (TIO) is an online code playground and collaborative tool that allows you to quickly test snippets of code in over 600+ programming languages. It has a simple interface with an editor on the left and a console output on the right.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API