From UiPath StudioX

1. Access the Tools tab from the Backstage view. The extensions you can install become visible.
2. Click the Firefox Extension button. Mozilla Firefox opens up and a confirmation pop-up is displayed.
3. Click the Add button, and then OK to confirm. The UiPath Firefox extension is now installed.

From the Command Prompt

1. Click the Windows Start button and type cmd in the search field.
2. Right click on Command Prompt and run it as administrator.
3. Change the directory to the UiPath installation folder (cd C:\Program Files (x86)\UiPath\Studio\UiPath).
4. Use the SetupExtensions /Firefox command to install the extension. Firefox opens up and a confirmation pop-up is displayed.

5. Click the Add button, and then OK to confirm. The UiPath Firefox extension is now installed.