I've got a Macbook (OS 10.6.8), and I've been using Firefox 3.6 for over a year. Every team a new version of Firefox is released, I download it in the hopes that it will be faster than the current version. But I've been disappointed every timethe browser is slower, especially when using Gmail. Why might this be? I've tried disabling Add-ons and that hasn't helped much. Is it because my Macbook is from 2009? Any thoughts would be much appreciated. I've tried asking Firefox myself (via post and Live Chat), and they haven't been very helpful.