How to enable Safari browser as the preferred Easy JavaScript Simulation...

How to enable Safari browser as the preferred Easy JavaScript Simulation editor Preview.
select Ejs Options ( right bottom last second icon)
Running tab (First)
Preview command: open -a "Safari" // MacOSX Example
open -a "Google Chrome" // MacOSX Example
open -a "FirefoxDeveloperEdition" // MacOSX Example
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" // Windows Example
"C:\Program Files\Internet Explorer\iexplore.exe" // Windows Example
"C:\Program Files (x86)\Aurora\firefox.exe" // Windows Example
google-chrome // Linux Example
firefox // Linux Example