[Blind-sysadmins] Firefox 57 Quantum and NVDA under Win 7

Hi all, System: Win 7 Pro 64 Bit Screenreader: NVDA 2017.3 Firefox Version: 57.0 64 Bit I just installed Firefox 57 Quantum on this machine. I read online that this version should be more performant than the older versions and use less system resources. though i had to downgrade again to version 56.0.2 and disabling updates for a while because my pc decided to not like that version all that much. CPU usage rose drastically and the computer became unresponsive. I wonder if that is a NVDA thing or other people might have the same issues with other assistive technology. Greetings, Simon