Opening Firefox will give smooth scrolling. A few seconds later it will become extremely choppy. Resizing the window will 'reset' this short time period. Using GPU-Z I found that my GPU goes to 3D clockspeeds after starting/resizing Firefox and it will switch between Idle and 3D clocks as needed (during scrolling) for a few seconds. After this short period the GPU no longer ramps up the clocks and stays at Idle speeds unless I resize the window. GPU is a GTX980. I've had this problem for a long time, never felt like putting in the effort to fix it until now. Dual monitor, main monitor is 120hz 1440p, secondary is 60hz 1080p. I only really started noticing this after I got the 1440p monitor. I've updated the drivers whenever I could, it never fixed it. Until now I worked around it by forcing my GPU to be at 3D clocks non-stop, but that's not ideal. If anyone could help me either fix this outright or help me find the cause, please, I would very much appreciate it.