How to test the browser compatibilty of your WordPress blog?

I have noticed this for Firefox windows users which enables you to view IE inside Firefox. But this doesn’t allow testing on a mac etc.

https://addons.mozilla.org/en-US/firefox/addon/1419

If you find a solution then it would be good to know.

I was searching on google and found this site:

https://browsershots.org/

I don’t know how reliable their test results are. Does anyone have any experience using this site? Is there a site that is much better than this one?

That’s who we use. Best bet would be to use them in the morning though as they get overloaded fairly quickly and queues quickly hit 30-45 minutes.