Firemin removes over memory usage of Mozilla. Firemin improves Firefox memory usage, in particular, the vanquishing of memory leaks. Firefox was using over 800MB of memory after about 3 days. It’s quite normal for Firefox to be sucking up 100MB of memory right off the bat.
Simply put Firemin, it will eliminate most memory leaks in Firefox. Their memory optimizations engine applied it to Firefox and most memory leaks were gone.