ExternalInterface is supported in the following combinations of browser and operating system:

 
Browser: Internet Explorer 5.0 and higher
Operating System: Windows 
  
 
Browser: Netscape 8.0 and higher
Operating Systems: Windows and Macintosh 
 

Browser: Mozilla 1.7.5 and higher
Operating Systems: Windows and Macintosh 

 
Browser: Firefox 1.0 and higher
Operating Systems: Windows and Macintosh 
 

Browser: Safari 1.3 and higher
Operating System: Macintosh 
 
