If they are free I can usually be relied upon to take a handful:

IE6 SP1
Netscape Navigator
Mozilla 1.6
Opera
Firefox (just got that in the last couple of days)

I tend to use IE out of force of habit................I am old

/off topic

If anyone is having a problem with Mozilla loading, try turning off your popup stopper.............hmmm i guess my defence mechanisms on this test box are now like a shoal of starving pirahnas.............they will eat anything I throw to them

/

Cheers