How do I make "ActiveXObject('SAPI.SpVoice')" work in firefox

How do I make ActiveXObject('SAPI.SpVoice') work in firefox? firefox does not recognize the ActiveX开发者_运维技巧Object function. Are there any alternatives for this?

Firefox does not support ActiveX technology, you can try using plugins or extensions

Because Firefox does not use ActiveX, you have to use a JavaScript substitute such as

http://www.masswerk.at/mespeak/

and

http://www.jtalkplugin.com/