EcmaScript 5 browser implementation

So Sa开发者_StackOverflowfari and Chrome have started in their betas to implement some ES5 stuff. For instance Object.create is in them.

Do any of you know if there is a website that shows the progress made in the browsers? ATM i need to use Object.freeze, and wanted to see which browsers (if any) supported that yet.

Here's an up to date list for major engines: http://kangax.github.com/es5-compat-table/