Salesforce.com on FireFox 3 is super fast

I have been using Safari for Windows when using Salesforce.com for the past 3 months or so because it was just so much faster than using Firefox. Firefox 2 really didn't cope with all the javascript widgets in Salesforce and even if it was the only tab open, it would take ages to render each page.

When I installed beta 4 of Firefox 3 last night I thought I'd try it out on Salesforce and man has it improved. Firefox no longer hangs for 30 seconds when opening several different lead or contact records at a time and I can fly through the pages creating email templates and auto response rules.

If you're a regular user of Salesforce and Firefox it's definitely worth upgrading.

Have you noticed any other sites that work better with Firefox 3?