Firefox does not offer a 64 bit version of their browser and the 6.0.2 is a 32 bit version only.
Please review this posting for more information from Firefox:
This posting shows the frustration many people are having with Firefox and 64 bit versions of windows. At this time they only offer nightly builds for Firefox that support 64 bit. They are version 9.0.xx. And can be found on this page here:
But as they state these are only nightly builds and really for testing. At this time it would be best to use 64 bit IE 9.
More information on Beta 64 bit Firefox browser: http://gizmodo.com/firefox64
Here is the link to Google Chrome: http://www.google.com/chrome?&brand=CHMB&utm_campaign=en&utm_source=en-ha-na-us-sk&utm_medium=ha
We think their browser might be ok but again it’s worth testing.
If you spend some time searching the net you will notice that many people are having these issues with 64 bit browsers as they are still very new.
Here is the Link to the IE9 64 bit version: http://www.microsoft.com/download/en/details.aspx?id=23332
As many people that have IE9 on a 64 bit machine are not using the 64 bit version so please make sure you confirm that you are using the most recent version of the IE9 64 bit version. Again it is common for your new computer to have the 32 bit version not the 64 bit.