http://www.mozilla.org/en-US/firefox/10.0/system-requirements/

The same for Firefox 4 thru 11. With Firefox 12.o WinXP SP2 will be the oldest version of Windows that is supported.

Hardware-wise it is Recommended Hardware, no "recommended vs minimum".

Hi edmeister,

How can I find out if my computer supports SSE2 or not? It's a custom made box, not an off the shelf unit.

Joe D.

Intel Pentium 4 and later CPU's support SSE2, along with AMD chips from 2003.

Coreinfo in Microsoft SysInternals will test for SSE2 support.
http://www.mathworks.com/support/solutions/en/data/1-B3MR75/

Hi again edmeister,

Despite the fact hat the download page for Coreinfo states that: Coreinfo "Runs on:

   * Client: Windows XP SP3 and higher.
   * Server: Windows Server 2003 and higher." 

I did download it, But when I attempted to open the .exe, I got a message that a file in my O/S (remember I stated that I was running Windows 2000 w. SP4 installed) was missing, therefore the .exe wouldn't run. Is there any other way to determine if SSE2 is installed without having to physically remove the CPU and look to see if something is printed on it to identify it?

Joe D

Sorry, I didn't look for the current system requirements for Coreinfo. I last used it when I was still using W2K SP4, which may have been before MS bought SysInternals, or I had an older copy from before MS bought it.

Try CPU ID. That will tell you the processor you have, without resorting to "surgery", and it will also report on the instruction sets that your chip handles.
http://www.cpuid.com/

I registered at CPUID, but their current version only works for Win XP/Vista/7. And their "Other Versions" page only lists by model/type/name of main cpu/processor, and no mention of o/s's. Thanks for your help, but I'm giving up on this.

Joe D

http://www.oldversion.com/CPU-Z.html = CPU-Z 1.42 is the newest for W2K

Or you could try the Windows system information in Start > Accessories > System Tools

I haven't used W2K for a few years now (and the WinXP version I now use has all the garbage removed - Tiny WinXP), but IIRC that should tell you if you have a PIII or P4 processor installed

That did it! The CPU-Z 1.42 program brought up a lot of info on the processor, MB, etc. that I'm sure I'll find very useful in the future. Thank you very much!

Joe D.