I have a 15" 10' MBP with 4GBs of ram. I notice the page file builds up very quickly due to my heavy usage of firefox. It stutters my computer when it does. After a while it could build up past 10GB. Looked around for solution and no luck so far. What troubles me even more is that I always have ~900mb of ram inactive while the page files stack up and makes the browsing experience very unpleasant especially when I watch videos. Anything I can do to fix these problems?