It would surely use more than 70% of your CPU's power and graphic cards power because the virus is taking your computer's resources for themselves this kind of problem is a common issue regarding what does the virus does to your computer, and surely prevention is better than cure but what if it bypasses that prevention most of us are talking about, I think this kind of Virus can be removed by Malwarebytes, you can surely double-check it just to be sure and you can even reset your browser in a default settings as well.