Firefox won't run any faster using RAM than it does using your HD...the amount of data it reads/writes is a tiny fraction of what the average HD is capable of.
Most of it is cache files, and you can already configure Firefox (via about:config
) to use mostly RAM and very little to no disk space for the cache, but that defeats the point of having the cache to begin with.
Plus, it really makes no difference you'll ever notice.
I do, however, wholly support the advice to download more RAM. In fact I'd love to know if anyone's gotten this to work yet.