I like your passion so much, I felt as though I was reading my own mind! faved&fanned:) I have 4 GBs RAM on an HP Laptop (DV7 1243cl) and FF kills my memory all the time, so googled and I found a pretty light weight browser which is fast but ads popup are a turn-off.
http://www.slimbrowser.net/en/I think I will have to go tinker with it and see if it can be customized to be a viable option to the browsers.