Too Long; Didn't Read
Selenium is a free and open-source framework for testing web applications. The Selenium WebDriver endorses various browsers, including Firefox, Safari, Chrome, Mozilla, and Internet Explorer, and enables you to easily automate the browser testing over different browsers. JavaScript, C#, Java, Python, Perl, and Ruby are all supported by Selenium. Selenium test suites can be written on any platform, including Windows, and then run on another platform, like Linux or Mac.