Came across this program couple days ago. It's a firefox booster, 100% free and easy.
Very small 0.3mb download, then start the program, 5mins or less most the time. 20-40% speed increase from what friends and I can tell.
Does not delete cookies, passwords or anything.
It's like defraging Firefox, it just organizes things better for the computers benefit.
Make sure firefox is shut down when you run the program.
It's 100% free, it's not a trial offer of anything.
Recommend to do once a month. Parhaps twice a month for really heavy surfers.