I have a macbook unibody 2008 2.4, I ungraded to snow leopard, Id say for the past 3 months any time I open up safari or firefox after I have 5 tabs open the computer runs slow as can be. The computer when I scroll the little pinwheel pops up before I can do anything, it has gotten so bad the pinwheel has to pop up when I type more then 5 words. It has gotten so bad that even after the browser is closed I have to reboot my computer before it will run normal again. I know its not my ram I upgraded to 4gb of ram and I do clean out history and defrag on weekly basis. Is there any solutions that wont require a reboot