Firefox keeps mini-freezing, or locking up or something. Its not really frozen, because if a video's playing at the time it'll keep playing like normal, but other than that its effectively frozen. I can't press any links, I can't use the browser buttons, I can't scroll, I can't type, and I can't even minimize the window. Opening up a random file from my desktop seems to make the problem go away (at which point everything I tried to do while it was frozen will instantly happen all at once), but then it'll happen again in a couple of minutes.