Uses too much memory in about:performance it is the highest on the list and causes memory leaks in windows 7 home. It might of been ok before but it needs updating as it slows the whole pc down if memory is leaked and you reach your maximum memory cap.

edit- My no script takes up varies, at one point it jumps the queue and becomes the highest memory usage, then other times it doesn't. It could be my setup but also I think your computers that can handle it are far faster and have way more memory than me. Perhaps some websites are causing it to spike high due to more scripts being blocked? Also hate to burst your bubble bro, its a good addon but some websites don't work one of them is bowflex.com even when enabled all the scripts.