Selenium 4.0 is a new version of open-source tool/framework for automating web browsers. When using this tag, also include other tags for the specific components you are using, e.g. gecko driver. It does support all latest browsers.
Selenium is an umbrella project for a range of tools and libraries that enable and support the automation of web browsers.
It provides extensions to emulate user interaction with browsers, a distribution server for scaling browser allocation, and the infrastructure for implementations of the W3C WebDriver specification that lets you write interchangeable code for all major web browsers.
Selenium 4.0 is the upcoming new version of selenium.
Change Logs
Link to the changelongs of the selenium clients: