I have a PC running Windows 7 32-bit with Firefox installed. When I open Firefox it instantly takes the CPU utilization to 100%. I have to kill the application to get the CPU utilization to drop back to normal levels. I have uninstalled and reinstalled Firefox but, I am still having the same issue. I looked through the event logs but, it is not generating an error when it pegs the CPU. Is there a known problem with Firefox 57.0.4?