I enabled virtual mode. After I was done I disabled it and rebooted. Now FF is missing all addons and settings that I had before installing Returnil. It's completely ruined. I put a lot of work customizing Firefox and expected Returnil to protect those settings. I am so furious right now. I almost got the pro version and I am very relieved that I didn't go through with it. To make matters worse, system restore has never worked on my computer for some reason (why do I ever bother enabling it?), so I can't even get my stuff back that way.