Hello RayP. I haven't moved over to 64 bit on anything yet. Even my new notebook is dual core 32 bit.
I used to use Firefox all the time, but have recently moved over to Googles' Chrome.
This is mainly due to the new HTML and CSS and Firefox is still a kittke behind.
Have you tried it on a 64 bit machine?
Experience any problems with Firefox compared to Chrome if you have?