Just got linked to this from Lifehacker, not tried it yet
Seems even new SSD suffer from wear problem so this may be the way to go, on my atom based system its painful at times to use firefox. Its like watching Wargames!
Anyway thought I would share
I've been doing this for a while now. I've got my /tmp mounted as tmpfs and have firefox (and others) save their cache in /tmp.
The results are not dramatic, but it's probably faster and it helps keeping the hard disk spinned down longer while on battery.
You would expect running cache from ram would be faster
Lets be clear we are not running firefox simply its cache
Good point for net/laptop users