Firefox-on-steroids is more like it! Rated 5 out of 5 stars

Initially I was skeptical about the 'Speed' bit in SpeedFox as there are a few other add-ons who claim to speed up Firefox, but the fact is it does work (immediately in fact)
i.e. installed it less than an hour ago & VOILA! my pages now load more than twice as fast

This review is for a previous version of the add-on (