|Assuming you are not getting the issue with either gaming or graphics intensive programs with both monitors, so it should not be an issue with the power supply not being powerful enough for the graphics card/system. (Let us know if this is not a correct assumption.)|
It may not appear to matter but most times including details on your hardware including motherboard, CPU, graphics card, power supply at the least, can help us find a possible solution.
Try reviewing your browser add ons and removing or disabling the ones you did not specifically install or want. Then clean out your browser (History, Cookies, etc.). Then run Malwarebytes to be sure you do not have makware causing your issue.
You have to be a little bit crazy to keep you from going insane.