Firefox is a 32bit application. It can run on 64 bit windows, and the development team is currently working on a 64 bit version of Firefox. Are you having a specific issue with Firefox that is causing issues with x64 windows?

Thanks for your response, Tylerdowner. After more looking into it, I think my problem is with Word 2010, not the browser.

Waterfox is 64 bit firefox

I am-if I have more than four tabs open Firefox becomes non-responsive.

ETA: Firefox 11, Windows 7 64-bit.

Will upgrading to 12 fix this or is there a version that supports 64-bit Windows 7? Thanks.

That isnt caused by this matter please open a new thread.

Thanks, I'll do that :)

Seems that I must install 32 bit java to run java applets, would a 64 bit FF fix this problem?

In order to use a plugin like Java in Firefox, you will have to use a 32bit plugin with a 32bit Firefox. If you have a 64bit Firefox (not officially released yet BTW) you'd need a 64bit plugin.

I installed Waterfox 12, and it solved the problem I was having with lagging and freezing. That said, Waterfox makes available the 64-bit versions of the necessary plug ins needed on the same page that Waterfox is available and I've not had a single problem since installing them. Most Firefox extensions also work just fine - the transition from Firefox to Waterfox was seamless.

Is the Firefox 13.0 a 32-bit or 64-bit program? I'm using Windows 7 which I believe to be a 64-bit program.