To run the browser under Selenium automation tools, you need to install Web drivers.
Go to the studio settings window and click "Install browser web-drivers for Selenium".

Web-driver installation window will be opened.

In the opened window from the drop-down list you can choose for which browser to install the driver.

After selecting the browser, click "Install" and the necessary driver will be installed.
Additionally by clicking on the button "Open install directory" you can view the contents of the folder where the driver was installed.
You can also uninstall the driver by clicking "Uninstall" or update the driver by clicking "Update".