Selenium IDE means Selenium Integrated Development Environment, it is one of Selenium products.
Selenium IDE is a plugin for Mozilla Firefox that allows programmers and test engineers to verify web software products.
The plugin can record and play back actions of the web application users.
It can also be utilized for generating code for other Selenium products such as Selenium WebDriver and Selenium RC.
Testers use Selenium IDE for writing test cases. It is a useful open source instrument for automation of web software testing efforts.
Web Application Testing