I have VISTA Home Premium and run Mozilla and have had nary a problem.
But that’s also because I unloaded Norton Symantec and use Avast.
Now, my puter isn’t crashing every other month!
Besides, AVAST is free and doesn’t eat up the memory on this laptop.
http://www.avast.com/eng/download-avast-home.html
Thanks, have to check that out!!