When I start up a fresh Firefox, things work pretty ok. But soon after, it starts pausing all the time. Hover over a link, and it takes a second or two to switch cursors. Click in a text field, and it takes a few seconds to become active. Start typing and every few words, it pauses and then catches up. Try to scroll and it takes its time doing it. I've followed tips on previous issues that sounded similar. Accessibility programs disabled in options. Tried in safe mode. Tried a full refresh. Nothing works. Any more ideas?