JavaScript and __proto__ - what browsers use it?

Question

What web browsers use the __proto__? Mozilla states that:

Note that __proto__ may not be available in JavaScript versions ot

Answer 1

The Browser Security Handbook has a table showing which browsers expose __proto__.

Currently, those browsers are:

• Firefox 2
• Firefox 3
• Safari
• Chrome
• Android

Those excluded:

• IE 6, 7, 8
• Opera