Selenium is a portable framework for testing web applications. Selenium provides a playback tool for authoring functional tests without the need to learn a test scripting language (Selenium IDE) https://www.acte.in/selenium-testing-training-in-chennai. It also provides a test domain-specific language (Selenese) to write tests in a number of popular programming languages, including C#, Groovy, Java, Perl, PHP, Python, Ruby and Scala. The tests can then run against most modern web browsers. Selenium runs on Windows, Linux, and macOS. It is open-source software released under the Apache License 2.0 https://www.acte.in/selenium-training-in-chennai. Selenium IDE is a complete integrated development environment (IDE) for Selenium tests. It is implemented as a Firefox Add-On and as a Chrome Extension. It allows for recording, editing and debugging of functional tests. It was previously known as Selenium Recorder. Selenium-IDE was originally created by Shinya Kasatani and donated to the Selenium project in 2006. Selenium IDE was previously little-maintained. Selenium IDE began being actively maintained in 2018 https://www.acte.in/selenium-testing-training-in-bangalore. Scripts may be automatically recorded and edited manually providing autocompletion support and the ability to move commands around quickly. Scripts are recorded in Selenese, a special test scripting language for Selenium. Selenese provides commands for performing actions in a browser (click a link, select an option) and for retrieving data from the resulting pages https://www.acte.in/selenium-testing-training-in-hyderabad. The 2.x version of the Selenium IDE for Firefox stopped working after the Firefox 55 upgrade and has been replaced by Selenium IDE 3.x https://www.acte.in/selenium-testing-training-in-coimbatore. In addition to the official Selenium IDE project, two alternative Selenium IDE browser extensions are actively maintained: Kantu (Open-Source GPL license) and Katalon Recorder (Closed Source) https://www.acte.in/selenium-online-training.