How to Download & Install Selenium IDE for Firefox

Installation of Selenium IDE

What you need

  • Mozilla Firefox
  • Active Internet Connection

If you do not have Mozilla Firefox yet, you can download it from

Steps 1) Launch Firefox and navigate to Click on Add to Firefox

Steps 2) Wait until Firefox completes the download and then click “Add.

Steps 3) Once install is complete, you will get a confirmation message. Click “OK”

Steps 4) Click on the Selenium IDE icon

Selenium IDE will open

Firefox DevTools in Firefox

Firefox DevTools is a Firefox feature that we will use to inspect the HTML elements of the web application under test. It will provide us the name of the element that our Selenese command would act upon.

Step 1) Right click anywhere on the page and select Inspect Element. You can also use shortcut Cntrl + Shift + I

Step 2) You will see the Interface

Step 3) You can right click on an element and chose CSS or XPath. This is useful in object identification

Note: Likewise, you can also use Developer Tools in Chrome to identify object properties

Selenium IDE was deprecated, and the development had stopped. Only recently the project has been resurrected. The new Selenium lacks many features compared to the deprecated IDE. Features are being added but at a slow pace. To explore all the features of Selenium IDE, we recommend you use the old version. To use the old version of IDE

Step 1) Use Firefox 54 Portable Version check here

Step 2) Visit Selenium IDE version and install

The following features may not be available in latest IDE version. We will keep updating the tutorials as the new version is updated.


Selenium IDE can support additional Firefox add-ons or plugins created by other users. You can visit here for a list of Selenium add-ons available to date. Install them just as you do with other Firefox add-ons.

By default, Selenium IDE comes bundled with 4 plugins:

1. Selenium IDE: C# Formatters

2. Selenium IDE: Java Formatters

3. Selenium IDE: Python Formatters

4. Selenium IDE: Ruby Formatters

These four plugins are required by Selenium IDE to convert Selenese into different formats.

The Plugins tab shows a list of all your installed add-ons, together with the version number and name of the creator of each.

User Extensions

Selenium IDE can support user extensions to provide advanced capabilities. User extensions are in the form of JavaScript files. You install them by specifying their absolute path in either of these two fields in the Options dialog box.

  • Selenium Core extensions (user-extensions.js)
  • Selenium IDE extensions

You will be able to find tons of user extensions here.