Is Javascript only available for web browsers?

Question

I would like to know about Javascript. Is Javascript available only for web browsers? Because I used some Javascript code for Firefox Plugin development and Thunderbird.

Help me to find out more about this: where can I use JavaScript other than web browsers, and how?

Answer 1

No! Have a look at Google's V8

Answer 2

There's node.js which includes a full webserver and runs on Google's V8